One thing to remember when you swap out a barrel, make SURE and I said SURE you check the chamber/breechblock spacing to be sure it is in spec. A GO/NO GO check is warrented to make sure you dont have excessive head space and that also it will chamber properly, I know a few instances where a ring of metal was milled off to get a proper fit and sometimes the chamber will have to be rereamed. Never hurts to check the chamber spec before you shoot it. John Sabato is right, I have also seen rough barrels shoot like a match barrel, I would shoot it first to be sure you want to do this. Good shooting and be safe.