We'd need a lot more specific information to provide any kind of meaningful response, but if the groups are no better than 3" at 100 yards, there is something wrong with the gun or the shooter is simply afraid of the recoil.
Also, 3300fps for a 180gr bullet is about the right velocity, with 113 grains of H870. Even with a 30" barrel, 3200-3300fps is in the ballpark. The best you could get would be maybe another 100fps...even Weatherby's factory ammo only claims 3,400fps. Incidentally, there are only a few powders slow enough to be appropriate for this cartridge, the most common of which is H870. Check back with us if you can get the exact load recipe your friend is using.
Also, 3300fps for a 180gr bullet is about the right velocity, with 113 grains of H870. Even with a 30" barrel, 3200-3300fps is in the ballpark. The best you could get would be maybe another 100fps...even Weatherby's factory ammo only claims 3,400fps. Incidentally, there are only a few powders slow enough to be appropriate for this cartridge, the most common of which is H870. Check back with us if you can get the exact load recipe your friend is using.
