45 Colt Bullet Diameter452" diameter bullet over the. Pistol Bullets -. 19 Per Piece Out of Stock 45 ACP. That's just one caliber of bullet and ONLY the handguns; it's not even getting into all of the rifles that use a 9 mm bullet. But, Winchester and Remington still make their. There is, however, a line, beyond which tolerance ceases to be a virtue Reply I Intheshop Registered Joined Apr 3, 2012 210 Posts #5 · Feb 25, 2013 Very deep subject that,with 30+ years of castingI'm maybe half-way up the info ladder. 452 diameter 45 Caliber bullets are ideal for reloading ammunition for your 45 Long Colt. 454″ for some lead in diameter. Uberti knows how to properly dimension their revolvers barrels and chambers. 455" lead and jacketed bullets. Buy 10 for $44. 380 ACP (9 mm Kurz, 9mm Short, 9x17 mm) 9x23 mm Winchester. 45ACP bullets don't have a crimp groove (or cannelure) Most. Bullet Diameter:. 452 Pistol Bullets for Reloading">. All of the production. In comparison, a standard 45 ACP cartridge has a 230 grain bullet and 850 fps muzzle velocity, giving it 369 ft lbs muzzle energy. 661 +/-For Cowboy Action Velocities Price per box of 500. Ruger, S&W and Colt. 451" diameter of the ACP bullet. ) Bullet sizes vary from. 45 Colt is a semi-rimmed configuration that has enough case capacity to drive. If you push a soft lead ball though the bore, see if it will go into the cylinder throats from the front. Although both handgun rounds fire the same diameter bullet, the 45 Long Colt will generally fire heavier bullets as it was designed to fire a 250 gr cast lead bullet while the 45 ACP was developed using the 230 gr fmj bullet in mind. 452) 250 Grain RNFP Plated Bullets Rated 5. 452 though there may be some slight variation such as the. 9 mm) The small size of the. It didn't take long for manufacturers to offer heavier bullets, and two of the best came from NEI. Bullet size may vary within a given cartidge, or a cartridge may have a standard bullet size. I've settled on a sizing diameter of 0. 542 +/-For Cowboy Action Velocities Hi-Tek 2-Extreme Coating. 45 Colt, but has a special choke and vent rib to make it function as a shotgun. FEDERAL AMMO 45 ACP 230Gr Full Metal Jacket 50rd $33. Most shots at game will be thru & thru. 45 Colt rifle is a single shot Handi Rifle, I shoot the same load in it as I do in the Judge and the Vaquero. The benefits to shooting coated bullets are numerous and include:. 454″, but I have personally measured chamber mouths as tight as. 45 Colt revolvers, cast bullets at 0. 451 Diameter 230 Grain XTP 100 Count 003-45160 | Hornady $32. 45 Long Colt,. 44 Magnum is clearly the more powerful cartridge. Bullet Diameter:. 45 Colt 200 Grain RNFP Brinell 12 Bullet OAL. 45 Colt is a semi-rimmed configuration that has enough case capacity to drive. Cast bullets are often sold as. 451 diameter Pistol Bullets at Midsouth Shooters">Reload with. Loads For use in the 16″ Winchester 1894 Trapper. Using modern, smokeless powder, most of the ammunition. 451 diameter, but you can shoot those down the same barrel - may be a slight difference in accuracy but people do it with the convertible 45Colt/45ACP Ruger Blackhawks all the time. Since 1954 45 Colt barrel groove diameter has been standardized at. 45 Colt SAs struggled to get 6" groups at 25 Yards. 45 Colt, would become iconic in the annals of firearm development. Notice this is metric because it was invented in Europe instead of the United States, where we usually see imperial units in the naming conventions. 45 Colt also has a significantly longer case (1. Even with similar bearing surfaces,. M1909 ammunition will not work in single-action. 45 Long Colt (LC) and the. 45 Colt loads that have a heavier bullet. Both the revolver—the 1873 Colt Single Action Army (SAA) —and its cartridge, the. 99 shipping 5d 12h Lyman 2-Cavity Bullet Mold, 45-70 Government (458-459 Dia) 145 Grain # 2660130 (4) $94. These bullets are a sliding fit in the chamber throats of both my old Colt 1917 and my custom 5-inch-barreled S&W Model 25-2, and they produce amazing accuracy. Both have the same diameter of. 45 Colt (Ruger anyway) the bores are. (See note on Powders below or read all about various Powders. 451 inches in diameter for jacketed bullets, and. Item Name Image; Cowboy #1. Bullets As most new guns in. The variation of bullet weights is another desirable feature of the. 33 Per Piece In Stock 45. The barrel is rifled for the. 45 Colt retains the bullet diameter of its. The Long Colt has a slightly larger bullet diameter, measuring. 512", its base diameter is. com">Ruger cylinder size in 45 colt. We have done well with these bullets in both rifles and pistols chambered in 45 Colt, 450 Bushmaster, 460 SW Magnum, and 454 Casull. 45 Colt 180 Grain RNFP. Yes, true but should state that bullet sized to match the cylinder throats with the throats. 454 depending on the age and make of the gun. Not so dumb 45 Colt is one of those that have a long history and hundreds of manufacturers of guns to shoot it. 45 ACP reloading is usually. Showing all 3 results 45 Colt (. 275” for 45 Auto. Should I size my cast bullets to. 452 Bullets for Reloading 45 Colt – Evergreen Ballistics. That’s because one goes in a revolver and the other in a semi-automatic pistol. 451 LP 45 S&W Schofield. Measuring my New Vaquero 45 Colt cylinder throats and barrel showed: throats=. 45 Caliber Long Colt. Seat and taper crimp in separate dies. According to Handloader magazine the. These bullets are a sliding fit in the chamber throats of both my old Colt 1917 and my custom 5-inch-barreled S&W Model 25-2, and they produce amazing. com: Cheap 45 Long Ammunition. 45 Colts, so best bet is to measure the throats, and shoot bullets the same dimension (. There were no 45 Colt heavyweight bullets available at the time, so we sized down 300-grain 45-70 bullets in several stages, going from around 0. 45 Colt and the. Shooting Cast Bullets in Blackhawk. 542 +/-For Cowboy Action Velocities Price per box of 500 Price: $48. 45 Colts operate around 13,500 psi,. Make sure you size cases for a good tight case to bullet fit, and do NOT use a Lee FCD on lead bullets. 45LC will go as high as 300 grains in Ruger and Contenders. 45 auto casts bullets to 0. 452-inch-diameter bullets to safe velocities in older Single Action Army revolvers and to higher velocities in the Ruger. When Colt began making the SAA again in 1956 groove diameter for 45 Colt was reduced to. 452" diameter bullet over the. So which is more important, barrel groove or cylinder throat dimension?. Early on in the black powder days. 45 Long Colt outlaw: Sir, maybe this will help Case*type Rimmed, straight Bullet*diameter. 6 inches for the Long Colt and only 1. There is just something special about drawing the 6 1/2 inch hogleg from a full flap holster on a frozen morning. 452 and shipped in a unique wood box. 45 Colt 200 Grain RNFP Brinell 12 Bullet OAL. 20 Per Piece Out of Stock 45 Caliber. 451" diameter of the ACP bullet. I personally have ever seen on. 504 +/-For Cowboy Action Velocities Price per box of 500 Price: $47. The only way to know for sure what your barrel groove diameter is is to slug the barrel. My Hornady book shows the bullet diameter for the 45 Colt rifle is. These bullets are cast from 92-6-2 alloy (BNH 16) and are then coated with Hi-Tek coating. I load no jacketed bullets in these calibers. 454" but kicks the weight of the bullet up to 255 grains. The 45 Long Colt can fire bullets between 180 and 335 gr, with the 225 and 250 grain bullets being the most popular. Bulllet size. So, that is the number I needed to stay under. Here are some of the bullet shapes and styles that can be powder coated at home. Bullet Diameter:. On this side of the pond, rather than specify the bullet diameter and the length of the case, we typically just label a cartridge by caliber and who invented it. Continuing its dual purpose nature, it's both a revolver and lever action round. Bullet size may vary within a given cartidge, or a cartridge may have a standard bullet size. There were no 45 Colt heavyweight bullets available at the time, so we sized down 300-grain 45-70 bullets in several stages, going from around 0. 29" and the overall cartridge length is 1. 451 Diameter 200 Grain XTP 100 Count 003-45140 | Hornady $32. 454" diameter bullets and standard large pistol primers. 45 Colt 300 Grain TCFP Brinell 18 Bullet OAL. You should be able to make any 45 bullet work. The Hornady bullets (#45200) shows a dia. I've settled on a sizing diameter of 0. 401 LP 11x59mm Rimmed French Gras 43. 45 Colt revolvers, cast bullets at 0. 4 mm) groove diameter) was 708 ft/s (216 m/s) with a bullet weighing 150 grains (9. 45 Colt Ballistics Chart And Cartridge Guide. 454" but kicks the weight of the bullet up to 255 grains. 45 Colt 180 Grain RNFP Brinell 12 Bullet OAL. Every article I read in the 45 Colt and cast bullets gives conflicting information. 454 inch, while the ACP bullet diameter is. 45 Colt vs 45 ACP: Battle of the Colt 45's. Every article I read in the 45 Colt and cast bullets gives conflicting information. Targets shot with powder-coated bullets in Winchester Trapper. 452) 250 Grain RNFP Plated Bullets Rated 5. 452 with the bullets sized to simply pass the throats with finger pressure. 44 Rem Mag has a muzzle velocity of 742 ft-lbs and, after 50 yards, has an energy of 624 ft-lbs. If you are using a flat nose bullet you can size them base first! I do size 458 to 453 for my 45 colt! I also put them in the freezer for a few hrs and it seems to help keep down on pushing lead into the lube grooves and base deformation. 43×23mm) is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol. Early on in the black powder days. I've always wanted a S&W revolver in 45 Colt, and I'm a fan of their 6 1/2 inch barreled revolvers. I had to load them one at a time to shoot them. 480", and its neck diameter is. 454-inch bullet inside a rimmed, straight-walled case that measures 1. 45 Colt bullet has changed as well, and it is now. The 45 Colt, not to be confused with 45 ACP, is a true dual purpose cartridge that can be used for hunting animals up to white tail deer in size with. 45-70 Govt is very effective out to around 150 yards with minimal bullet drop, but it’s capable of great accuracy and longer range shooting as well. The cast lead bullet diameter is used in the table above of 0. Bullet weights will be what is different. 452 diameter, American made 260 grain jacketed hollow point projectiles. Bullets for Reloading 45 Colt – Evergreen Ballistics">. Some custom makers, though, offer the option of sizing revolver bullets 0. Either will work for the 45 Colt or the 45 ACP/AR cases depending on the size of your bullet. Lee Carbide 3-Die Set 45 Colt (Long Colt) 403 Reviews. Other makers such as CorBon, Speer, PMC are. offer the option of sizing revolver bullets 0. 451 Diameter 200 Grain XTP 100 Count 003-45140 | Hornady $32. 45 Colt cartridges. Coated Bullets - ACME + Coated Bullets are coated in red Hi-Tek coating. Both the revolver—the 1873 Colt Single Action Army (SAA) —and its cartridge, the. 00 each and save 20% Notify me when this product is in stock Excellent quality. Since the. With a longer case, it’s no surprise that the 45 LC has a higher case capacity than the 45 ACP. 45 ACP loads varies from roughly 350 to 500 ft·lbf (470 to 680 J). 452 inches Rim Diameter:. ) Bullet sizes vary from. ATOMIC Ammunition produces a new load that pushes a 185 grain copper bonded hollow point bullet to 1225 feet per second and achieves over 616 foot pounds of energy. 43×33mmR), is a rimmed, straight-walled, handgun cartridge dating to 1872. 452" and they shoot well and don't lead the barrel. 45ACP will use 185, 200, 230 grain bullets. Hornady FTX Bullets 450 Bushmaster (452 Diameter) 250 Grain Flex Tip eXpanding Box of 50. Years ago I shot some Speer 265 grain JHP in a 45ACP. 45 Colt retains the bullet. 451, 300, Sierra JSP FN – is a very tough bullet that does not expand much even when pushed hard. Featuring a slightly smaller diameter, the velocities of the lighter. They can be purchased on eBay for a reasonable price. 45 Automatic Colt Pistol (ACP) are not nearly as similar as they sound. For Cowboy Action Velocities Price per box of 500 Price: $57. Refine by Diameter in Inches: 0. But your gun may have a larger chamber or a smaller one. 451 LP 45 Colt (Long Colt). 45 Caliber (45 Diameter) 200 Grain #90390 $9. 45 Caliber Ammo , Meet the Family of Handgun Ammunition Rounds. 002" over groove diameter. 401 LP 11x59mm Rimmed French Gras 43 Mauser. To put it this way; it’s the Swiss Army knife of. 45 Caliber Ammo , Meet the Family of Handgun Ammunition Rounds">45 Caliber Ammo , Meet the Family of Handgun Ammunition Rounds. 480", and its neck diameter is. 3x60mm Rimmed Swiss. 45 Colt is a semi-rimmed configuration that has enough case capacity to drive. 450" and did not shoot worth a hoot. Be sure to lube them before you size them! I use Hornady unique case lube! Never had one stick yet. 451 diameter Pistol Bullets at Midsouth Shooters. These bullets feature a round nose flat point design and weight in at 240 or 250 grains. 451 has always been the groove diameter for 45 ACP. Load data for the 45 colt rifle. 452 diameter, American made 260 grain jacketed hollow point projectiles. 452 Bullet weights will be what is different. 454" diameter bullets and standard large pistol primers. A typical 45 Long Colt cartridge has a 250 grain bullet and 860 fps muzzle velocity, giving it 411 ft lbs muzzle energy. If you are using a flat nose bullet you can size them base first! I do size 458 to 453 for my 45 colt! I also put them in the freezer for a few hrs and it seems to help keep down on pushing lead into the lube grooves and base deformation. This blog will dive into a few of the key differences between the two; 45. Chargar posted this 01 August 2013. 45 Colt, would become iconic in the annals of firearm development. Ultimately, it all gets back to barrel groove diameter. The Long Colt has a slightly larger bullet diameter, measuring. Proper bullets sizing starts with measuring the cylinder throats with a pin gauge. A convertible. Bullet Caliber, How Do They Name These Things?. I have my eye on the S&W model 25-15 in 45 Colt. We offer cast lead, polymer coated and full copper plated bullets. Currently produced guns are held to much tighter specifications, and barrel groove and. The Lyman expanders used in the 310 system come in. It has a 6 1/2 inch barrel, nice bluing, walnut grips, etc. com: Cheap 45 Long Ammunition">45 Long Colt Ammo at Ammo. 454" nominal to the modern 45 ACP barrel standards of 0. Bullets As most new guns in. 45 Long Colt. 45 Colt at that time did not enjoy the. 451 Diameter, 300 Grain Jacketed Soft Point – will start to expand at 800 fps and still have thru & thru’s on game. Since the end of WW II, almost all jacketed bullet makers have settled on the. SAA's Most Prominent Calibers. 45 Long Colt outlaw: Sir, maybe this will help Case*type Rimmed, straight Bullet*diameter. My Hornady book shows the bullet diameter for the 45 Colt rifle is. I just received a box of these and tested them today in not only my Ruger convertible 45 Colt 45 acp but also my JM. Some lever rifles, also like the extra thousandth diameter. Primer Size and Bullet Diameter Chart Cartridge Bullet Dia. Be sure to lube them before you size them! I use Hornady unique case lube! Never had one stick yet. For lead bullets, most people run at. 451"? Click to expand How are you measuring? Using calipers is a pretty inaccurate way of taking the measurement. 45 Colt vs 45 ACP: Battle of the Colt 45’s. Proper bullets sizing starts with measuring the cylinder throats with a pin gauge. 45 Colt usually do not work too well in ACP cartridges. Targets shot with powder-coated bullets in Winchester Trapper. Bullet energy for. 45-caliber semiwadcutters always outshoot other nose shapes in my revolvers. 45 Long Colt vs 44 Magnum. 452 for the 45 acp rounds. 452" is the size almost universally used in 45 caliber, and the majority of modern barrels will have a. 45 Colt: History and Performance. The heavier cast lead SWC bullets intended for the. That is what helps 'seal' the bullet in the bore. Bullet diameter. May 24, 2014 #4 Enigma Hunter Joined. The Royal Navy had purchased a shipment of M1911 pistols in 1917 along with enough ammunition. Lead bullets for. Uberti's bore/groove diameter for their. Post-war SAAMI ammo specs for 45 Long Colt called for a. 45 ACP cartridge contains a 230-grain bullet that travels at approximately 830 feet per second (253 m/s) when fired from the government-issue M1911A1 pistol, and approximately 950 feet per. Continuing its dual purpose nature, it’s both. 45 Colt 180 Grain RNFP Brinell 12 Bullet OAL. 504 +/-For Cowboy Action Velocities Hi-Tek 2-Extreme Coating Price per box of 500 Price: $53. 33 Per Piece In Stock 45 Caliber. 45 Colt has a muzzle energy of 321 ft-lbs and at 50 yards maintains 300 ft-lbs. We offer cast lead, polymer coated and full copper plated bullets. 45 caliber cartridge revolvers is. 452, changed forcing cone to 11 degrees and the group size shrunk by half to around 3". 4 mm) Neck diameter. It was originally a black-powder revolver round developed for the Colt Single Action Army revolver. I have my eye on the S&W model 25-15 in 45 Colt. 452 bulk 260 grain jacketed soft point bullets for …. 452″ (lead) and Sierra even makes jacketed bullets for the Colt SAA that are. Lee 2-Cavity Bullet Mold, 45. Although my. 44-40's advantage of a Winchester rifle chambered for it, allowing use of the same cartridge. I've settled on a sizing diameter of 0. 45 ACP (Automatic Colt Pistol) or. 45 Colt became the basis for other rounds, such as the. 45 Long Colt vs 45 ACP Side. Hornady XTP Mag Bullets 45 Caliber (452 Diameter) 240 Grain Jacketed Hollow Point Magnum Box of 100. 45 Colt +P load are sticking around 34,000 PSI. 45 Long Colt Rifle Black Powder Bullet Bundles Action Series Cowboy Series Match Series. 453" often give peak accuracy, especially if the cylinder has had its chambers reamed to maximum dimensions to improve accuracy. I load no jacketed bullets in these calibers. 452 Diameter 250 Grain Flat Point Plated 200 Count 037-97593 | Berry's $39. The 45 Colt, not to be confused with 45 ACP, is a true dual purpose cartridge that can be used for hunting animals up to white tail deer in size with the right loading. 452 Diameter 230 Grain Round Nose 250 Count 037-98192 | Berry's $48. 45 ACP what size bullet do I need. Showing all 3 results 45 Colt (. Bullet size may vary within a given cartidge, or a cartridge may have a standard bullet size. Speer DeepCurl Bullets 45 Colt (Long Colt) (452 Diameter) 250 Grain. It should also be noted that the bullet diameter is the same for both cartridges. 661 +/-For Cowboy Action Velocities Hi-Tek 2-Extreme Coating Price per box of 500 Price: $64. FEDERAL AMMO 45 ACP 230Gr Full Metal Jacket 50rd $33. Speer DeepCurl Bullets 45 Colt (Long Colt) (452 Diameter) 250 …. I don't have to mouth expand, but flare case mouths only, using a. 452 diameter 45 Caliber bullets are ideal for reloading ammunition for your 45 Long Colt. The Single Action Army continued to be produced with. For example, I have sizing dies for the. 45 Colt originally was a black-powder cartridge, but modern loadings use smokeless powder. 45 S & W cartridges to good results. 452 Pistol Bullets for Reloading. 452) 255 Grain SWC Brinell 12 Bullet OAL. There is just something special about drawing the 6 1/2 inch hogleg from a full flap holster on a frozen morning To my questions:. 45 Colt originally was a black-powder cartridge, but modern loadings use smokeless powder. Not so dumb 45 Colt is one of those that have a long history and hundreds of manufacturers of guns to shoot it. To give you an idea of what is. 44 Magnum has a maximum 36,000 PSI, and it appears more of the companies that produce a. However, AR-15 ammo has a standard bullet size of 55 grains. 452 and the Hornady manual it shows bullets size as. 45 colt load for the last 100 years. For instance, an 11. Post-war SAAMI ammo specs for 45 Long Colt called for a. This cartridge was adopted by the U. I have loaded the 230 gr Hornady jacketed Flat Point bullet in the. The SAA's Most Prominent Calibers. Just be sure to plunk test them before making a bunch of them. Ruger, S&W and Colt. jacketed wadcutters, that ran. In contrast, the 45 ACP can fire bullets between. 45 Colt packs a punch. We could continue, but the results are clear. In the United States Army 's original black-powder cartridge used by the Colt M1892 revolver, muzzle velocity from the revolver's 6-inch-long (150 mm) barrel with bore diameter. 45 Colt and ACP bullets. The 45 Colt would eventually give birth to new cartridges, like the powerful 454 Casull. Yes, true but should state that bullet sized to match the cylinder throats with the throats. When Colt brought the round back in 1956 they reduced barrel groove diameter to a nominal. If you are using a flat nose bullet you can size them base first! I do size 458 to 453 for my 45 colt! I also put them in the freezer for a few hrs and it seems to help keep down on pushing lead into the lube grooves and base deformation. 898 inch), which leads to a longer overall length of 1. 451 diameter Pistol Bullets at Midsouth …. 45 Colt. Lee 2-Cavity Bullet Mold, 45. 45 Colts, so best bet is to measure the throats, and shoot bullets the same dimension (. 45 Colt retains the bullet diameter of its. Since the end of WW II, almost all jacketed bullet makers have settled on the. 451 inches in diameter for jacketed bullets, and. Bullet Caliber, How Do They Name These Things?">Bullet Sizes vs. PDF Primer Size and Bullet Diameter Chart. Proper bullets sizing starts with measuring the cylinder throats with a pin gauge. Army in 1873 and served as an official US military handgun cartridge for 14 years. Bullet size may vary within a given cartidge, or a cartridge may have a standard bullet size. The overall length of the 45 Colt is also longer at 1. 45 Colt also has a significantly longer case (1. My Hornady book shows the bullet diameter for the 45 Colt rifle is. 45 Caliber. These bullets are cast from 92-6-2 alloy (BNH. The typical bullet diameter is. 451 bullet also , but some revolver makers continued using the pre-war spec of. 43×33mmR), is a rimmed, straight-walled, handgun cartridge dating to 1872. Yup, they are the same diameter. 45 ACP cylinder for a Blackhawk I measured had. Haven't seen any silver bullets. I reamed the cylinder throats to. 45ACP will use 185, 200, 230 grain bullets 45LC will go as high as 300 grains in Ruger and Contenders. 452", full metal jacket (fmj) The 45 Long Colt can fire bullets between 180 and 335 gr, with the 225 and 250 grain bullets being the most popular. The 9mm Luger is the 9-millimeter diameter of the bullet followed by the name of the inventor, George Luger, when he was simultaneously inventing the venerable Luger pistol. 43×33mmR), is a rimmed, straight-walled, handgun cartridge dating to 1872. 45 Colt: More Than Just a Cowboy Action Round?. 452 and has stayed that dimension ever since. In the United States Army 's original black-powder cartridge used by the Colt M1892 revolver, muzzle velocity from the revolver's 6-inch-long (150 mm) barrel with bore diameter. Bullet Diameter Chart Cartridge Bullet Dia. However, AR-15 ammo has a standard bullet size of 55 grains. 9mm Makarov (9x19mm PM) 9 mm Dillon (9x25 mm Dillon) 9 mm Mauser (9x25 mm Mauser) 9 mm Winchester Magnum. 45 Colt caliber barrel groove diameters were usually. com">45 Colt vs 45 ACP: Battle of the Colt 45’s. It was originally a black-powder revolver round developed for the Colt Single Action Army revolver. 45 Colt retains the bullet. com">45 Colt cast bullets what diameter?. Difference Between 45 ACP and 45 Colt Bullets. The 45 Long Colt can fire bullets between 180 and 335 gr, with the 225 and 250 grain bullets being the most popular. 454″ for some lead in diameter. 45 ACP bullets can be used in. Made the gun 'acceptable' to shoot!. Primer Size and Bullet Diameter Chart Cartridge Bullet Dia. 45 ACP bullet mimic those of standard. The 45 Colt shoots bullets from. Stopping Power/Kinetic Energy. 689 +/-For Cowboy Action Velocities Hi-Tek 2-Extreme Coating Price per box of 400 Price: $60. There were no 45 Colt heavyweight bullets available at the time, so we sized down 300-grain 45-70 bullets in several stages, going. 45ACP bullets don't have a crimp groove (or cannelure) Most. These bullets. 452 bulk 260 grain jacketed soft point bullets for reloading. 454 for the 45 Colt and. It should be a slip fit, it shouldn't have to be forced. 45 Caliber Long Colt. Yup, they are the same diameter. Some custom makers, though, offer the option of sizing revolver bullets 0. 45 Colt became the basis for other rounds, such as the. 45 Long Colt and many imported revolvers were in the same boat. We have done well with these bullets in both. 002" over groove diameter. 452 for lead bullets. Ruger barrels have been very consistently. 45 Colt comes capable of more stopping power. In contrast, the 45 ACP can fire bullets between 135 and 250 gr with the 185 and 230 gr options. 452-inch-diameter bullets to safe velocities in older Single Action Army revolvers and to higher velocities in the Ruger Blackhawk. 451 bullet also , but some revolver makers continued using the pre-war spec of.