This is a neat article I found. I think it is worth reading.
I have seen a lot of talk about free floating barrels and I have known and would like to let others know that free floating the barrel is just one of a few ways to find accuracy in a rifle. Some rifles dont do well fully free floated or floated at all.
Some of the tricks I try whenever I set up a rifle
1) Make sure the action screws are snug
2) check the scope. If the rifle is not shooting well it could very well just be the scope. I have that happen myself with loose screws on the rings.
3)From there it is the ammo ...at least it has been for me anyways. I have not owned any trully bad shooting guns. Well my Nylon 66 has seen better days. Every time I put a scope on it I get 4 inch groups at 30 yards.
4) would be the stock Although I have not had to go to step 4 before.