OK so learned something new..., I was using Winchester AA wads (the white ones) and they must have a lower melting point than the ones Prairie Dawg uses, cause a bore brush on the end of a cleaning rod and a power drill still wouldn't get the crap out of the barrel. Luckily, back in the 1980's I won my division in a three-gun match, and the match host gave out small bottles of original Hoppe's (with benzene put back in). They were made by the host's father, an industrial chemist in Raleigh, NC and he was the source for my information on the original Hoppe's formula. I remembered where I stashed that old bottle, and voila the plastic just dissolved right out.
As far as the fiber or felt wads not working well..., they are an old technology..., and I think the guys reloading them today might not know how to use them ???
I was taught that you don't use them "dry", which I bet is the problem the reloaders who are familiar with the shot cups are doing.
To use felt wads, I was told, you melt 1 part beeswax, and one part olive oil (or tallow, or lard, or shortening) and mix that together while both are very warm. Then you either dip the felt wads into the melted lube using a toothpick gently inserted into the side of the wad, and hold it in the lube for two seconds, then place the lubed wad on a piece of aluminum foil to cool (remove the tooth pick and use it on the next wad, etc), OR some folks like to put their wads in a plastic mixing bowl, in a single layer, and pour the lube over the wads, covering the wads, and let lube cool. Then extract the wads. Melt the leftover lube, slowly, in the microwave on a low setting, and repeat or save the lube for another day.
Method two allows you to do more wads, more quickly, but the wads are soaked deeper, and you use up a lot more lube. But if you're doing a couple boxes of shells for a match..., the second method saves you a lot of time.
I use the first method for wads that I am using for BP shotguns. Also a 50/50 mix of lube is kinda stiff and hard but has a higher melting point than a softer 1/3 beeswax 2/3 lard mix. OH and paraffin is NOT a substitute for the beeswax. Melting point is way too low, and on a hot summer day, you run the risk of contamination of your powder.
Of course you can always buy the wads, prelubed from Midway:
https://www.midwayusa.com/product/2...-thickness-pre-lubricated-felt-package-of-100
I hope this helps. I know Prairie Dawg's info on the shot cups should help me in the future.
LD