I am trying to squeeze the most accuracy i can from my windham mforgery. I have replaced the trigger with an SSA-E, and free floated the chrome lined barrel. With hand loads (22.5 grains benchmark and hornady 55 grain soft points) the best I can get is about 1 moa, and I average 1.5 moa. I am thinking of replacing the barrel with an 18" stainless RRA. If I were to spend the $300 on a new barrel, how much of an improvement would I get?