OK, managed to get to the range today. The star of the test loads was 38 grains of W748 under a 150 grain Speer fn. Gave 1.5" and 2" groups at 100 yards. I didn't bring the chronograph so I don't know what the speed is, but I'll check that next range session. 40 grains gave almost 2600 fps and showed pressure signs - so, I'm hopeful that the 38 grain load is hovering around 2500. Based on past tests, that would make sense.
