While at the Medina Gun Show this past weekend I picked up a little 100-count baggie of .38Spl coated 130-gr RNFP bullets from Buckeye Bullets. I am trying to replicate my current favorite Cowboy Action load which is 125-gr LRNFP over 3.7-gr Trail Boss with a Fed-100 SPP (yielding about 763 fps from a 6' barrel with five shot ES = 56.5) except with a coated bullet. I got the "Midnite Black" color.
52 F, 53% RH, 30.44" Hg
.38 Spl 130-gr Coated RNFP, FED-100 SPP, Trail Boss Powder, 1.446-1.464" COAL
Taurus 66 with 6" barrel
3.4-gr AVERAGE = 695 fps; ES = 52.9
3.9-gr AVERAGE = 790 fps; ES = 46.7
4.3-gr AVERAGE = 818 fps; ES = 61.6
4.9-gr AVERAGE = 846 fps; ES = 73.9
5.1-gr AVERAGE = 851 fps; ES = 34.8
The 3.9-gr load gave very good results. Comparable velocity to my current favorite CAS loads with slightly better ES. I'll have to load this into my CAS pistols and rifle and see how it does.