I shoot steel cased tula and wolf all the time, no problems except for the occasional bad primer. As previously stated both will work but 308 runs a little hotter. Most of your 147-155g ammo (steel or brass cased) should get you into the 2-3" group range at 100yd. I typically get .75-1" groups with most 165-168g match ammo. I haven't found a ammo yet that it won't eat. Congrats on the rifle.