Hi,
What do you think of the idea of using used batteries as shotgun slugs ? I looked up diameters online and it seems AAA batteries are good fit for .410, and AA batteries are good fit for 20 or 24 gauge.
Also if you glue a stack of pennies together, it should fit in 10 gauge barrrels. A stack of 10 pennies should give you a 360 grain slug, and if you file the diameter down by 0.6 mm it should fit in 12 gauge barrels.
You have to reload your shotshells of course. Anyone want to try this ? I'd like to know the terminal ballistics of such slugs, and how many pennies you can recover in spendable shape for a dead deer.