Bob - about leading in the future - Wholesalesports in Calgary (and probably Edmonton as well) is where I mail ordered Kleen Bore brand "Lead Away" cloth and cleaning patches.

When they say, Lead Away, that is exactly what happend when you shove a patch down the bore. There is no need for bronze brushes or JB to try to get the lead out. "Lead Away" does it all.
The last time I bought this stuff, it came in small patcheds in a blister pack. This is the last of the previous purchase - large square cloth for cutting patches from. Too, a swipe across the front of a revolver's cylinder with a patch of this stuff removes all the baked-on lead. Incredible material - kind scary even, the way it works. Seems like magic after all those decades of scrubbing with solvents and brushes.Now, just a patch of material on a jag and the lead's gone.