I'll play...

2.8 grains of Bullseye and hollow based wadcutter

3.0 grains of Bullesye and a Lyman 358425 wadcutter

3.6 grains of Bullseye and the RCBS 38-150 SWC

3.6 grains of Bullseye and Lyman 358439 (yes, 439). It's the HP version of the 358429.

5.2 grains of Unique and the RCBS 38-150

5.0 grains of AA#5 and the RCBS 38-150

for whatever reason, I never have found a recipe for the 358429 that would shoot less than 3" at 25 yards. I've tried it in a K-38, my Outdoorsman, and my Blackhawk.