Tried it again today, both with a couple more grains of H4350 and the IMR4895 that Ingwe suggested. I tried 43.0 grains of 4895, two grains over the max listed by Sierra. Also tried some Speer DeepCurl loads left over from yesterday, with 48.0 H4350.
The winner is looking to be the 50.0 H4350 load, which group into around 1-1/4" at 2600 fps. The other two would work as well, but are around 2500 fps and group around 1-3/4" to 2". I'll have to shoot the 50/H4350 load some more to make sure, of course, but it looks real good so far.
