Is it actually marked spelled out, ‘grains’? Or is it abbreviated, ‘gr’, or ‘g’?
I know European manufacturers like Cheddite, Sellier & Belot, or Zala, use grams to describe the load of the shotshell. They use the term 20 caliber, instead of ‘gauge’ too, but for that size of shotshell the usual load is about 26g ‘grams’.
Your 12 nomenclature is half as much than that for small to medium size bird game shotshells. Doesn’t make sense in grams, less so in grains.
As far as powder in a 2-3/4”, 20 gauge/caliber shotshells generally contain about 380 grains of powder.
I’ve never heard of “grains” referred to anything other than bullet, or powder weight.
Unless the 12 nomenclature on your shotshell is a calculation of the diameter of shot size by subtracting the shot size number from 17 and dividing that by 100. Example: #5 shot —> 17 - 5 / 100 = .12”.
I wouldnt want to shoot any shotgun shell youll ever load. I highly doubt you could get 380 grains of powder in a 20 gauge shell. When I loaded target rounds with 1 1/8 oz in the 12 gauge it was only 16.5 to 20 grains depending on powder/primer/wad and hull configuration. I highly doubt a 20 would be loaded with a T sized pellet and pretty sure this is a size designation for steel and not lead! Like I said previously,just cut one open? not that difficult.


















































