I have a Knight MK 85 that shoots a 525 grain bullet that I cast. The first shot cut's the line, one inch high every time you shoot it. It is super accurate, and devastating out to 150 yards with open sights. I load it with 120 grains of 3F Blackpowder. The load is a killer on both ends. The rough part of the bolt brings the blood to the webbing of my left thumb every time I shoot the rifle. The load is devastating on elk. I have only shot three elk with the load, but I hope to use it next year in NM. I am drawing for a special handicap hunt, the guide said my odd's were good. I got my finger's crossed. Tom.