I have a couple of A-Bolts with the Boss system. Once you decide on a load, you can actually gain some accuracy advantage by tuning the compensator for the load. Takes a bit of fiddling but once you figure it out, leave it alone and use the same loads. If you don't mind the price, Federal premium with the Barnes TSX bullet will do about anything a 270 can do and do it well. Winchester Supreme 130 grain bullets are good too. Another advantage to both is that they are environmentally friendly lead free ammo if you find yourself in an area that requires it. Your mileage may vary.