I used 125 yards for my poll, but then I remembered that the first doe I shot with my 220 was at 170 yards. However, my 125 yard shot was a head shot, so that is quite a bit harder than a center of mass hit.
The slug penetrated through 1/2" of bone just behind the eye and then came out the back of the skull where it was probably less than 1/4' thick and lodged under the skin.
I have had the same gritty action issue that everyone else mentioned, and I want to ask if everyone with the rough action has a stainless steel gun ? Because I notice that the blued ones look much smoother to me.