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 …

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

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

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 …

Aug 23, 2024 · I switched primers to fed 215M in my next test. ran the test again, 68.8, 69, 69.2 best group was 68.8 but more vertical than 69.2. picked 69.2 and loaded 1/10 to both sides. 69.1 was …

Mar 28, 2016 · I use Federal 210M with all bullets in the 6.5 PRC except the Hammer 124gr. For the Hammers I have followed their advice and use magnum primers, specifically the Fed 215M.

Jan 9, 2011 · I have seen on here that some people don't use magnum primers for the 7mm RM. Is this pretty typical? Would LR primers work better for RL22, H1000, and Retumbo? I have Federal LR …

Nov 14, 2009 · Saw a short report on using a large rifle primer for ignition in a M/L versus the 209 shotgun primer. There were no specifics so just looking at the two different primers,something …

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 …