O3mossy, I think it is A 1 in 12 twist, you can check it by using a barrel brush. Insert it all the way down to the magazine then reverse it to where your just past the free bore, mark the rod at the tip of the barrel in A "T" shape, then slowly pull it out until it makes one complete revolution then measure back to the tip of the barrel from the cross mark on the rod. It will be either A 1 in 10 or A 1 in 12. Do this A couple of extra time's just to double check yourself. Let us know as it make's makes A difference on what loads to give you.