I've been looking for one for a looooooooong time but could never find one, until I looked at the cast boolit mecca (Dollar General Store) and low and behold...a TWO PACK for $1.75??
I had some leading in my .45acp and it cleaned it RIGHT OUT in about 5 passes when wrapped around a brush!!
I used to get terrible leading all the way through my bbl, which was hard to diagnose because it is only 3.5" long (Taurus 24/7 Pro C DS). I got my lube figured out since I was able to reduce leading to the first 1.5-1.75" of my bbl.
My bbl slugs at .4515 and my boolits drop from my two molds at .452 and .453 respectively.
However, I'm shooting straight WW for now and I belive that with my load (4.5-5gr Red Dot) was not the right load for the assumed BH of 14. I will be making some 50/50 and 3:1 (pure to ww) alloy this weekend when it gets to 48F this weekend and will be casting up some new softer boolits. I think I might just have my problem licked!