Oct 12, 2022 · Agree that the small primer in a 45ACP must have a larger charge of powder. I load my competition LP 45ACP's with 4.1 grains of Bullseye Powder under a 200 grain semi or full wadcutter bullet. Using that same load with a standard small primer will barely recycle the slide.

Aug 26, 2014 · CCI/Blazer, Speer, and other Federal brass loaded with Small Pistol primer pockets simply have the ubiquitous ".45 ACP" or ".45 Auto" headstamp. Well, you ask, "So what?" Obviously, it must be safe to do so or they wouldn't risk it. But it can surely play hob with your reloading routine.

May 11, 2024 · What size primer should be used for .45 ACP ammunition? The recommended primer size for .45 ACP is large pistol.

May 27, 2017 · For decades, the standard primer size for .45 ACP was large pistol primer. A few years ago, Blazer started to use small pistol primers in their brass, and Federal has also started to load <some> of their cartridges with small primers; the Federal brass is marked 'NT' for non- toxic.

Primer Size and Bullet Diameter Chart Cartridge Bullet Dia. Primer Size 10.3x60mm Rimmed Swiss .415 LR 10mm Auto .401 LP 11x59mm Rimmed French Gras 43 Mauser.445 LR ... 45 ACP .451 LP 45 Auto Rim .451 LP 45 Colt (Long Colt) .452 LP 45 GAP .451 LP 45 S&W Schofield .454 LP 45 Winchester Magnum .451 LP

May 17, 2020 · I read recently that the reason the .45 ACP was originally made with the large primer was to compensate for variation in the location of the firing pin hole in 1911 pistols. A larger sweet spot for the firing pin to hit.

Oct 25, 2021 · Small Pistol Primer: 742fps. average with an extreme Spread of 44 fps. Large Pistol Primer: 737 fps. average with an extreme spread of 23 fps. This is way, way slower than the listed velocity led me to expect! OK, I know chronographs and conditions vary, but a minimum difference of 150 fps.?!

Feb 17, 2024 · Using Magnum primers in +P or higher-pressure .45 ACP loads can be beneficial for ensuring reliable ignition. However, it is important to follow established load data and consult reputable sources for safe recipes.

Feb 17, 2024 · What primers do I need for reloading .45 ACP? When reloading .45 ACP ammunition, it is important to use small pistol primers. These primers are specifically designed for this cartridge and ensure safe and reliable ignition.

May 14, 2012 · A rough comparison measurement (w/calipers, and obviously not the primer pocket size, but shows relative sizes) puts the one primer size around .210" and the other around .170", a .030" difference. You can even see it in the second picture.