builder have you noticed how deceptive that Knight Wolverine add really is? It has a 22 inch barrel and they are praising the ability to shoot 150 grain loads. Granted the rifle can take it, but I would almost guarantee you would not burn off all that powder. I have three of them rifles and they like 85 grains of loose powder. BUT they are a great rifle. That is the same price I paid for mine several years ago.