BD454,
Using 10gr of 2400, .5 to 1 gr below starting loads per Lyman Manual, for the following bullets; Lyman 311359 115gr SP GC and the Lyman 311410 130gr SP. These are the best loads I've ever tried in my 30 Carbine Blackhawk, bring groups down to an inch at 15 yards. Hotter loads (max recommended and factory) really flatten the primers in my BH, by backing off to the point where the primes do not flatten out and the cases extract easily this gun is a joy to shoot at the local indoor range.