My Savage 110 7 mm mag will not shoot less than a 2.5 inch group at 100 yards. What can I do to fix it? I bought the gun used and the seller said it has only had a few boxes run through it. I cleaned the copper out and broke it in with a couple of boxes of factory rounds. I killed a deer with it at 296 yards with a Hornady 139 g BTSP. Since then I started shooting Berger 168 VLD's through it, but it will only group them at two inches. Now it will not group less than three inches, six at 200, seven at 300 and not on paper at 400. I have tried three factory brands, Hornady 139's and 162's and Berger 168 VLD's in many different lengths.

I have cleaned every way possible. I think it is the crown or a bad spot where the brush catches midway down the barrel. If I bought a 6.5 x .284 barrel, what would I need to make it work on this gun?

My Savage Axis .243 will shoot six inch groups at 500 yards, so I don't think it is me.

Jim