I have a Remington 700 chambered in 243 Winchester. Has the 22 inch barrel, it's all factory. I am loading 95grain MatchKings for this rifle, and I am consistently making cold bote hits at my 6" 400 yard steel, and grouping a half minute at that range. I am super impressed with the way this rifle shoots, that being said, Sierra says that it is recommended to have a 9" twist or a faster barrel. I didn't think that the barrel from the factory was twisted that tight, does anybody know off the top of their head what the barrel twist is on these rifles? I dated this to a 1983 build.