I recently purchased a WW Greener 3 1/4 inch 8 bore hammerless ejector double barrel Shotgun produced in 1884. The 34 inch barrels show Birmingham blackpowder proof insignias on the underside of each barrel just forward of the barrel flats--next to the Birmingham black powder proof isignias is the following:
9B
Not for Ball
10M
I believe the "Not for Ball" means that the barrels are 'choked'.
But what does the "9B
10M" stand for??
What blackpowder load (amount of powder and shot) was this gun proofed for??
I've read Tom Armbrust's Book but I'm stilll confused--the gun and barrels are in excellent shape and I would like to shoot reduced power smokeless loads--but what pressures should I be limiting loads to?
Thanks for any help u can give.
