eroyd,
I agree with John. But, the grouse are going to have to be AWFULLY CLOSE for these shot capsule loads to be effective!!! I have shot rabbits using a 44 Magnum and the shot capsules, filled with #4 shot copper, at distances up to 12 feet!!! One or 2 of the #4 shot is all that is required to end a rabbit's existence. Effective range of these shot capsule loads isn't all that great. Good-luck...BCB