Per post #12;
4.0 grs of w231 is way too low.......... and will be dirty !!
I load 4.7 grs in a 38 case for 893fps with a lead 158 Speer bullet.
In a "L" frame this bullet in a 38 case can get up to 1124fps with slow powders.
I can see why you are having problems.
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