I expect the ignition is too irregular in light loads for good accuracy. That % unburned powder in a 6" tube predicted by QuickLOAD is high. The ballistic efficiency prediction was in the mid-teens, as if it were an overbore rifle. Might be a case where a Dacron tuft would help by holding the powder over the flash hole, but I sure wouldn't want to bother with that for plinking. I still can't get past my jammed cylinder, which I don't intend to repeat.
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