50 cal shot gun hits 30 -70 mile per hour 4 inch target hundreds of times a day in under a second

trap shooting targets are launched from a house or machine away from the shooter
skeet shooting targets are launched in front of the shooter intersecting from 2 houses
Sporting clay pigeon targest shooters walk a course of many launch points using
16, 20, 28 & 12 gauge guns built to withstand hundreds of shots in a single day event & shells with 11/8 oz 32g MAX mass of #6 or #7 steel shot or #7 ½ to #9 (2.0–2.4 mm) lead shot

1,290 ft/s (390 m/s) for 1 1/8 oz (32 g),
1,325 ft/s (404 m/s) for 1 oz (28 g),
1,350 ft/s (410 m/s) for 7/8 oz (24 g)

1 ounce = 16 drams = 437.5 grains.
1 dram = 27.34375 grains = 1.772 grams.
1 gram = 15.432 grains = 0.564 drams.

a constant & lengthy repeated use demand stress BUT
not heavy projectile or powder loades & usualy small shells

less than a second to move the gun & fire at a 4 inch target
that is moving 30 - 70 miles per hour, hundreds of times a day

in the 1920's modern 2 ¾ inch shells were introduced along with the star crimp

look up soda pop bottles top dimentions in International Society of Beverage Technologists (ISBT) & fire forming .303 British, .444 Marlin, or 9.3x74R rifle cases into .410 shotgun brass shells

One of the ways to test an unmarked shotgun barrel muzzle diameter was to try to
insert a dime it was a Full Choke if it failed & a Modified Choke or larger If it went in
is it an Open Bore or Cylinder Bore if a penny fits & .798 inch in diameter if the slug fits

penny & dime shot gun Coin wrappers are not to be misused
as 12 gage hulls or cups & nickles make bad primer pockets

$1.80 "LOOSE" dimes might never kill a goblin at 15 feet since
projectile penetration is dependant on the weight of each projectile
not the total weight of all projectiles SEO birdshot is for birds ,
buckshot is for deer , 22's kill both & slugs are for icky slime bags

I have numerous ideas, not from my own experience but
re-hashed from other websites that for various reasons
i have n..