Im trying to get some fire form rounds figured out for my 6.5-06 AI. I have been trying 120 grn Nosler BT with H4350. I have gone as low as 46 grns of the H4350 and am still getting case head expansion. I have tried seating my bullets longer than my guns col measurement to .020" off the lands. Im wondering if I need a different bullet/ powder combo to get better results. Any info would be greatly appreciated.