Hi i am new here. I just ordered a Browning xbolt 280AI. It has a 26 inch 1@8 twist barrel with a muzzle brake. Several guys told me H4831sc was one too use. RL 22 and RL23 are good powder for it also. I have a 280 rem and 7mm mag. I have always wanted a 280AI. I am planning on trying hornady...