I will be building a new GAP Crusader in 308 pretty soon and have a question. The gun build specifies a 22 in 5R barrel. I will probably be shooting it most of the time at 400 to 600 yards at my family's ranch property, but would like to be able to shoot at 1000 yards at the local military firing range when it is available. Will the 22 in barrel work for that or should I be looking at a 24 or 25 in barrel in order to do both accurately? Thanks for your help.