Mapper - We stay away from Federal and the new Winchester SR primers because the cups are thin. Reminton 7-1/2, CCI BR4 and Tula SRM are used the most. The older Winchester SR (silver cup) are good also.

Rumbler - My statement about Federal primers was aimed at the SR primer. I use the F210M primer in our .308s. Most of the Longrange shooters use them, CCI BR2s or Tula primers. Back when I used F205M primers and hot loads of AA2520 behind 80 gr SMKs, out of 20 rounds, 4 or 5 would be pierced the rest would be heavily cratered. I quit using them (still have a bunch) and went to Remington 7-1/2s or the old WSR primers. The CCI Military primers are great for anything where rapid fire is involved.

Having seen the aftermath of an M1A firing out of battery I don't want to participate in one (cracked the receiver and blew all of the rounds out the bottom of the magazine). One of those incidents was blamed on a high primer so when the bolt came home that little mark you see from the free floating firing pin went deeper and set the round off before the bolt completely closed. Makes me check the primers after I install them (personal quality control). I know of one out of battery incident that almost cost the shooter his right eye, so no soft primers for me.