.270?
I have used H4831 in my .270 Savage 110 for years, and in my opinion, it is hard to beat. With a load of 60 grains of H4831sc, behind a 130 grain Speer BTSP, I get about 3100 FPS, and a half inch MOA @ 100 yards. Jack O'Connor, according to some reports, used 62 grains of H4831 to push a 130 grain bullet, but I have been unable to find any loading manuals with this information, and I certainly am not advocating loading higher than any maximum loads posted in manuals! Most of the manuals I have seen list 60 grains as the MAX for a 130 grain bullet, with some listing lower maximums! As with ANY loads, these max loads should be worked up to with caution!