I finally had a chance to work with the 30BR a bit today after breaking in the barrel Sunday.
33.0 gr. of H4198X gave a 5 shot .122(!) and 33.5 gr. netted a nifty .105(!!!!). Gear was a Kostyshyn 1:17 four groove, BIB 118's and great 'smith work by 'Ol Stan.
The Kostyshyn 1:17 barrel cleans up like a dream and broke in with about 15 rounds.
I emailed Stan the targets..maybe he'll post them. -Al