- Feb 4, 2013
- 28,175
Not exactly:
Not the same powder, but you can load more H4227, so a load that is safe with IMR 4227, should be safe with H4227.
Hornady 8th has .357 data for the 158 gr. It lists both IMR and Hodgdon.
IMR 4227
start 12.4=1000 fps..................max 14.5=1150 fps
H4227
start 11.9=1000 fps..................max 15.1=1200 fps
This data is applicable to the 158 gr HP and FP XTP.
Not the same powder, but you can load more H4227, so a load that is safe with IMR 4227, should be safe with H4227.