Large Rifle Comparison Part II . Most manuals call for small rifle primers, (specifically the CCI #400), but if you talk to long-time loaders (and silhouette shooters) using this cartridge you'll find nearly all use a small rifle magnum primer. The standard pocket for a Large Pistol primer is somewhat shallower than its Large Rifle counterpart, specifically, 0.008 to 0.009 inch less. Small rifle primers, however, vary in thickness from .020" to .025." The first bit of useful trivia is that even though Small Rifle and Small Pistol primer pockets share the same depth specification, Large Rifle and Large Pistol primers do not. Here are the results of a test done to determine the brisance of primers. If you shoot a .308 Win, or any cartridge that uses a Large Rifle (LR) primer, you should read an important new article by Laurie Holland in Target Shooter Magazine.Holland, a talented shooter from the UK, tested no less … Most rifle shooters, myself included, tend to view the use of a small rifle primer in a larger center-fire cartridge as a good thing. Large rifle primers all come with one brass thickness, a nominal 0.027” (unlike small rifle primers which vary from 0.020” to 0.025” depending on make/type). Primer Hardness Chart Update ... added primers that I picked up at an estate sale. Click Photo to read full test results in Target Shooter Magazine.. In this case, it was a Federal large rifle magnum The pointer remains at the highest point of the shot. Test Procedure: Using a Lee Hardness Tester that measures Brinell hardness, placed a new primer on a piece of steel. This shows the pointer after a shot has been fired. Large Rifle Primer Comparison Part I. Using the large rifle primers as the example, mainly because that’s where I’ve found the largest discrepancies, switching primer brands in a particular load that is on the cusp of showing high pressure can easily push it over the edge. The testing was apparently done with a homemade ballistic pendulum, which left a lot to be desired. 2 Videos. Likewise, you’ll run across Federal .45 ACP cartridge cases that use small pistol primers rather than large ones. 14 Likes. Held the indent ball on the primer for 30 seconds. 625 Views. So, don’t take this as gospel but as a rough indicator. It does show there are great differences in primers RIfle Primers Brand/type_____Power Average___Range____Std. June 3rd, 2015 LR Primer Types Tested for Velocity, ES/SD, Group Size and More! Does primer size matter? Nothing’s ever completely cut and dry. July 9, 2018. The Copper Pill. 6.5 Creedmoor small v. large rifle primer brass comparisons. The shot is fired against a weight which in turn moves a pointer. ‘Berdan’ and ‘Boxer’ layouts and primer components. This is the home made tester. 04 January 2014. Large rifle primers are 0.008" thicker than a large pistol primer. 100% . James Calhoun's "Chart" is generally accurate. My findings are .020" thick primers work fine with .22 Hornet type fare, yet .222 Remington Magnum through .223 Remington work BETTER with .025" thick primers. For example, while most .308 Winchester loads use large rifle primers; I’ve got a pile of Hornady .308 Winchester cartridge cases that were loaded at the factory with small rifle primers. Primer Testing Reference. This testing was done to try and rank primers by power (brisance). All large rifle primers appear to be .027" in thickness. And guess how soft the old CCI 300's are? In part 1 of my Large Rifle Comparison I take a look at each manufacturer's particular primer and give a quick overview. ... Large Rifle Primer Comparison Part I. Small pistol and rifle primers utilize a cup 0.175" in diameter, while large pistol and rifle primers measure 0.210" across.

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