Brand new Rem 700 Varmint in .243 with 1:9.125" twist (my measurements show closer to 1:9.5", though), 200 yards, 3800 feet ASL, using a starting load that I threw together with no regard for the rifle's throat geometry or mag length. Here are shots 2-8 from the brand new barrel with the 105gr A-Max. Shot 1 was used to bore sight the scope at 35 yards (on another target), shot 2 was to get on paper at 200 yards, and shots 3-8 were fired into a 6-shot group. The group walked downward as the barrel heated up. Stability isn't a problem here. The 105gr A-Max does equally well in my old Sako AII .243 with a 1:10" twist, again at 3800 feet ASL.