I did nothing after crowning with the Manson tool and yes it never changed zero going from the 24 inch to 22.5 inchs. My hunting load of 54 gr of IMR 4350 and the Nosler 130 gr BT put the first two shots in the same hole and the third out about 1/4 inch from the first two at 100 yards, group was under a 1/2 inch. Accuracy improved over the factory crown. I'm sold on this crowning tool. Never had to touch the adjustment on the Zeiss was still dead on 2 inch high at 100 yards and that was a surprise. I wouldn't expect this to happen very often after shortening the barrel on a rifle. Just lucky i guess. This was the finished crown after using the tool with no other work.
