I owe this one to Daryl. Someplace, he mentioned firing the last shot of a shooting session at a greatly reduced load to take out the fouling ring that builds up at the top of the charge.
Yesterday while firing my .45 GM barrel at mostly 50 gr. 3F GOEX loads, I thought I would try a 20 gr. 3F load, partly to see if there did seem to be a cleaning effect, partly to see if it would even reach the touch hole and partly in trying to come up with a suitable "starter" load for a recoil sensitive 10 year old niece. POI at 50 yds only dropped 2" and windage was still dead on and clean up did not have the usual stubborn spot.
I think there's merit to this idea.
Plus, it was cool to be able to see the ball and patch separate on their way down range.