I agree with roundball completely. All too often when people think of a roundball, they think that the thing looses steam quickly and therefore has no power to take game at longer ranges. My longest is 80+ yards with a .54 caliber roundball which resulted in two deer down. I have a friend that hunts with a Kentucky long rifle in .50 caliber. It has a 1-66 twist and is made by Traditon's I believe. He never flinches at a 100 yard deer.He just kills them dead. I know of three off hand that he's made.

The effective range of a roundball is what you practice to. I would put mine at 100 yards and a little further with the .58 caliber only because of the power that big ball demonstrates. I still say if you can place that roundball in the right place, it is deadly out to 100 yards without a doubt. That's my own personal opinion and not based on ballistics.