When my dad died 15 years ago he left me a Remington 700 6mm bdl. Its was his baby! So now I have it and its my most prized possession. But last year it completely lost all accuracy. I took it to S and S precision and they said the barrel is copper fouled to the point of being useless anymore. So I am going to replace the barrel with a shilen chrome moly #3, have action trued and squared while he is doing it and have it bedded. What kind of groups should I expect this rifle to produce? I have never had anything except stock guns before. Thanks and God Bless