Double Tap 400 gr A frame, 416 Rigby. Top 2 shots kneeling at 55 paces. 2 in the blue one shot off hand one kneeling. I quit after that, all luck right there. I know nothing about the ammo figure give it a try. Comes in 450gr Woodleigh also. Brass is Norma and Jamison so it's reman. Something I didn't know. The A frames chamber tight in the Jameson brass, the Woodleigh rounds chamber fine.