Last Sunday I shot 122 pigeons and a crow with a Henry Egg hammer gun. Using Winchester Western 32g No.6 and Game Bore Pure Gold 28g No.5 shells - 294 in all between 11.00 and 16.00.

Felt a bit kicked around by the end as the gun is short for me at 14 1/4". Generally not too bad though. Your problem is poor gun fit and/or mount.