You're looking for 1220fps. That was the 3 1/4 X 1 1/4 load. Look to Unique powder. PB if you can find any. Anywhere 1220-1270 will make you happy.
Thanks for the information. I have some Winchester 540 (same as HS 6) and Unique that is listed as suitable for 1,220ish fps loads using AA HS Winchester hulls and my Winchester clone wads.
I think I'll use the Winchester 540 to burn some of it up, and the recipe calls for 30 grains of W540 using a 402 Hornady bushing, which ought to leave more room in the hull than 23 grains of Unique, using a 453 bushing (same as for Red Dot, BTW). You can't ever leave too much room in a AA HS hull for wad and shot, I've found.:)
Now to buy a bag of the hardest #6 shot I can find.
They did use #6, for the live pigeon loads, didn't they?
