OK so I don't shoot what you consider long distance, my limit is 500yd. And I can't change my rifle / barrel choices (Mark-X, 26" 1-12 shilen #5, 30-06, paralell throat thats long enough to safely shoot any factory ammo, Shepherd 310-P1), as I have just spent all my money having the origional 21.5" 1-12 barrel replaced (eroded throat for the second time). My question is ammo related. In the old barrel 61.5gr RL-19 behind a 150gr NBT was giving 1/2 moa, and I do intend trying it in the new tube. Can you give me any recogmendations for heavier bullet loading, considering the twist rate? Main usage is whitetail over hay fields, with some paper shooting during the summer. Sorry about being so windy.