Matt:
I tested a 1.25 oz bismuth load using 26 grains of WSF and had lower pressure, but a bit more velocity. (
http://parkerguns.org/forums/showthr...er+super+field). Not much difference in recipe, but you are about 1000 psi higher than me. My hull was 2 7/8 inches, fiber wad under the shot, and a fold crimp.
Did you individually weight each sample? Or did you meter load the samples? Can you post the result form?
I am particularly interested, as my 26 grain WSF load is one of my go-to duck loads. I’ve been very pleased with it this season.
-Victor