I would should heavier bullets but my barrel is a 12 twist. But my dealer has a box of Berger BT's with a BC of .532 and the Target BT's are like .516 or something but anywho. Anyone got a good load with Retumbo and COAL? I been shootin' 180 Nosler AB with 100.5 gr of retumbo for hunting and they shoot great with a COAL of 3.822. But just wanting some more input.