Thread: 270 Winchester ammo

Greetings Ariki,
1 grain seems a very low tolerance for cartridges, especially if the batches are not all from the same manufacturing lots. The boxes should have a lot number on them somewhere. Manufacturers don't use canister grade powders but alter the charge to give the target velocity. Along with Micky above I would be interested to see where the variance is and also how the heavy and light culls shoot in one group. Could save a lot of busy work for no return.
Regards Grandpamac.