Anyone out there got any good loads with a 140g AMAX from a 264 with H4350, H4831sc, or H1000? I like to stick with "H" powders for temperature and lot to lot consistency. RIfle is new, but an older winchester model 70 XTR with a 1 in 9" twist. I dont think the twist is the problem as its leaving round holes out to 600 yards, and its shot a .4" group at 100 yards, however next time out and everytime after that, its shot no better then 1.5" at 100. This was with 67.5g H1000. If I cant get the 140 AMAX to shoot very well consistently, then I think I'll move down to the 123g AMAX or 120g NBT.