Thanks. The Peterson data is very helpful.Will also say H4350 has worked well for me too. Peterson Brass has a good article about what are safe pressures in the 22 Creedmoor.
Peterson Cartridge | Match-Grade Brass Rifle Casings
American-made brass rifle casings designed by, and for, long-distance shooters and reloaders.www.petersoncartridge.com
How was the velocity and charge with the n555Loaded mine with 77 CC over N555. Little slower than 4350 but works very close. At the time I could find it so bought some to try. Also have some loads with RL17 both work well.
Would like to get your take on why you were getting pressures with Alpha/Peterson brass, because I would almost certainly want to use one of these premium brands for my projected 22CM build. I thought most people were saying the Alpha brass was of Lapua quality, which I always found could withstand high pressures over many firings without loosing the primer pockets...I tried Peterson and Alpha brass but couldn't get good velocities without high pressures. I neck down Starline 6mm CM small primer brass for my 22 CM.
I've only shot 75gr ELD-M's out of mine. With H4350, I'm getting around 3500 fps with a 20" barrel & suppressor.
I tried RL 26, but didn't have good results with a short barrel.
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5 shot group at 100 yards
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Would like to get your take on why you were getting pressures with Alpha/Peterson brass, because I would almost certainly want to use one of these premium brands for my projected 22CM build. I thought most people were saying the Alpha brass was of Lapua quality, which I always found could withstand high pressures over many firings without loosing the primer pockets...