I thought OWD's question really interesting, because truth be told, I NEVER thought about/read about/encountered shot being used in proofing a shotgun.

Rocketman, in a way, answered this question by mentioning the use of shot in the fouth point of his "Proofhouse Treatise".

Now, of course, thinking of proof marks on my OWN guns, for God's sake, I feel the fool; 1 oz, 1 1/8 oz etc. My eyes always went for the pressure and shell size. How in the world did I think they arrived at the amount of shot for the gun to be limited to?

So now I must add my voice to the masses and chime in, what size shot do they use and is it only one size; Is there a correlation to bore size, i.e. 10 bore gets size X shot, 12 bore gets size Y shot, etc.?

I've wiped the scraps of ignorance from my eyes and I now see a door blown off its hinges.

Last edited by Krakow Kid; 02/18/11 10:07 PM.