A picture of the Proof Marks would certainly help.

7/8 is a shot weight in ounces that is sometimes found on English 20 bore guns.

It is way too heavy for a standard load for .410. If remember rightly they were marked 3/8 for 2”, 7/16 for a 2 1/2” and 5/8 (or 11/16 ?) for a 3”.

Even with brass 3” cases and a Baikal to fire them in I don’t think Stan’s ambitions run to 7/8 oz in a .410”!

Last edited by Parabola; 02/16/23 04:07 PM.