I had chronographed Keith’s 5.0 grs Unique 38 Spl load under Rim Rock Keith 170 gr bullet (great bullet) and got an avg 964 fps (10 shot string) from my Ruger 4 5/8 inch BH. This can be duplicated using 6.3 grs Accurate #5 with same 170 gr bullet which got 963 fps.
Details:
Load: 5.0 grs Unique
1. 966
2. 951
3. 966
4. 985
5. 953
6. 980
7. 961
8. 977
9. 950
10. 960
Hi 985
Lo 950
Avg 964
ES 35
SD 11
Load: 6.3 grs Accurate #5
Primer: CCI 550
1. 928
2. 964
3. 967
4. 954
5. 969
6. 976
7. 979
8. 956
9. 970
10. 976
Hi 979
Lo 928
Avg 963
ES 51
SD 14