Good deal! Sounds like a nice little camper gun. Iffn you could choke the .410 at all, methinks the max range on that tiny round is @25yds, and your experience
[further] confirms my belief #71/2's is about the biggest size pellet that performs [reasonably] well in that .410 bore, altho I am a reloader and would like to try some #7's
for kicks and giggles.
Yeah they're a tad bigger than 7 1/2's (.10inches vs. .095 inches for the 7 1/2's. #6's are .11in in diameter).
An ounce of 6's consists of @225 pellets,
an ounce of #7's about 299 pellets, with an ounce of #7 1/2's having @345-350 pellets. An ounce of #8's has @408-410 pellets in it.
Also good to know about the .410 slugs and buck shot. I wonder what a "careful innovator" could make with that round and some properly sized lead wadcutter boolits (for a heavier projectile)?