RCBS Cast Bullet Manual shows a starting load of 3.7 grs. (744 fps) with a maximum load of 4.2 grs (810 fps) with 231 / cast 158 gr, SWC in the 38 Special ... therefore .... 3.8 to 4.0 of 231 should be a winner .
I use 4.0 grs of HP38 which I am now told is the same (or similar to) 231 with very good accuracy .
I say run with your proposed loads ... they should be just the ticket !
Gary
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NRA Member
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