Nov 7, 2025 · Back in the day before all the modern powders, bullets , chronographs etc we experimented with different primers and saw difference in group sizes. Options were limited back …

Dec 27, 2024 · The primers used are as follows: Federal 205 and 205 M, Remington 7 1/2 Bench Rests, CCI BR 4 and 450 magnum and Winchester WSR. All groups used five shots at 100 yards.

NOTE 1: According to Speer/CCI Technical Services - Both the CCI 550 Small Pistol Magnum and CCI 400 Small Rifle primers are identical in size. Both primers use the same cup metal and share the …

Nov 7, 2025 · I have always used CCI Primers in all my loading, with a few Federal Primers when I could not find CCI, my question on this thread, is there a big difference between using BR-2 Primers …

Jun 7, 2013 · With CCI the match primers have a bit different specs than the regular primers, thicker cups and maybe different compound. With federals there's no difference in specification between the …

Feb 14, 2019 · Have no Federal 210 on hand, have a ton of 215 specifically GM215M. I use them for my 300 RUM. Can I use them for my 30-06, 243, and 7-08? Thanks.

Nov 27, 2009 · Where would you use large rifle benchrest primers in lieu of standard or magnum? Are they they hotter than standard primers?

May 18, 2018 · Has anyone done any load development with White River Energetics large rifle primers? If so, what were your results?

Sep 29, 2024 · With magnum primers, especially when starting to work up a load from scratch I have found that there is no difference, It also simplifies which primer to use without going broke buying a …

Jun 28, 2025 · Winchester small rifle primers pierce quicker than any primer I have found, and many are under size in dia. On load development, I ALWAYS try different primers on a final load after finding …