I shot 4350 with 52 gr HP, but my books are down at the barn. I know it would be about 1.0 gr down from whatever a common maximum would be.
I've gone to BL-C2 with 55 gr SP in my .22-250, mostly because I've got 2 lbs of the powder, about 200 of the bullets, and that bullet doesn't work well out of my .223 but does out of the .22-250 so I'm flying them out of there.
