I hunt elk and with 450gr pp bullets my whites likes 90 gr pyro p tight groups at a hundred .I shot two deer last year ,one end to end didnt even slow down.Ive shot N.E. 460 and they work great.The pp bullet is just more accurate for me.IDAHO RON shoots 80gr with the pp 460 and killed his elk with it last year.I think what ever your gun likes in 80 -100grns would be fine.