Any advantage to lower pressures?

I am now in two minds about these predictions of doom for 231/HP38 so I am also wary of investing in it too heavily. What a shame to find that dream load in HP38 only to have it dry up!

I do have N320 already and that, being a very slightly faster powder than HP38. That may well be a good place to start.

N320: 10gn to 11.3gn for a 200gn jacketed bullet. So perhaps 10.5-12gn for my plated.

Sticking to a mid-weight charge perhaps I can get around 1050-1100fps from my 4"?
 
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