Re: powders for .308 ?
i use IMR4895, i generally shoot anything from 168 gr to 178gr and i get good accuracy and velocity.
The other week i was feeling frisky and had some 225gr match BTHP's laying around that i bought for my 300rum and wanted to try them in a .308, only problem was i only had the IMR4895 laying around. searched and searched with no luck for any load data with that powder on a bullet that heavy...not really surprising.
but i still wanted to do it. so found some data for 215gr bullets, crunched some numbers to figure out a charge and loaded up some.
Shot them out of my buddies 20" barrel rifle, the loads were perfectly safe, no pressure signs velocity was in expected range 2200fps (to be safe, again i was flying in the dark here)
but his twist rate would not stabilize the big 225 grers...plus short barrel and low velocity did not help situation. But they were still fun to shoot. recoil was noticeably more over the normal 168's we shoot out of his gun.
I could have loaded them a little hotter and pushed them a little faster to try and help with stability but it would just be a waste when there are obviously better powders out there for the bigger bullets, it was just something i did for shits and giggles