JLN,
That load sounded familiar. It was my first low pressure load, maybe five years ago. I bought the yellow windjammers and loaded 1 oz. using the exact formula you used that is found in the hodgedon book. I made them in 8 shot and 7 1/2 shot. Something was bothering me since its pressure was so much lower than all the others in the book that were near it so after shooting it for a while I had them tested by Ambrust. I sent five of each size shot.
I had cut these shells to 2 1/2" and used the Harten Crimp with an overshot card covering the hole in the middle which, if anything should have lowered the psi if it changed it at all.
There was no significant difference between the different shot sizes but they averaged about 7800 psi. After thinking about it I was still happy since I felt my damascus barreled guns were all in good shape with thick walls.
Still, I got a bit nervouse and switched to PB to lower the pressure and I use 2 3/4" hull length now. Mostly I switched since I use a progressive MEC loader and the time to add the overshot card doubled the amount of time to reload. The PB lowered the pressue enough to compensate for the longer shell in short chambers according to my reading of the literature.
Hope this helps you make a decision.
Milt
