Saw about 10 boxes of 12 gauge bismuth shells on clearance ($19 per box). My question is... If you have a gun that will shoot 3-1/2" shells - then why do you need bismuth anyway? Should be able to shoot steel shot through anything that can handle 3-1/2" shells (right or wrong?). Might be a good buy for someone to harvest the bismuth and re-use in older doubleguns.