Back when I was messing around with such things, I had more unburned powder when the loads were initiated with Std primers, rather than Magnum.
Too many variables such as barrel length and constriction, bullet weight and crimp, or a 'hot' or not load, have a seat at the table. But, 'generally', whoever that General is, in the revolver loads hawked at that time, std primers left more residue. That unburned powder residue got into the parts that revolved and extracted empty cases. That made revolving the revolver more difficult.
Powder has changed. That was then, now, I don't know.
salty
salty
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