Brake fluid, copper brush and a cordless drill. A used shell in the gauge of the gun your working on with a hole for the cleaning rod drilled where the primer used to be.Screw brush on end of rod stick shell in chamber and rod through the hole in the shell, attach cleaning rod to cordless drill and have brake fluid in a spray bottle to squirt into the end of the barrel. Move drill back and forth will spinning, apply brake fluid as needed. Take shorter rod section to clean chamber after used casing is removed. Patch dry apply a cleaning fluid on patch "stroke" a few times and look at the shine.
I use copper "Chore Boys". They clean just as well when wrapped around the brush but a lot easier on the barrel. People say the stainless will not hurt but why chance it when the copper is just as available?
fred- Most break cleaners and carb cleaners are acetone.
I have the following solvents in my shop, all work well and some can be harmful: Paint Thinner, Xylene, Toluene, Acetone, Carbon Tetrachloride, Petroleum Ether and Tri-chloral-ethylene. Please do not invite the EPA to visit me.
In terms of safety, availability and price, xylene cut with just a little kerosene might be the best. Give due warning to any mice that might live in your cleaning area. Xylene can, after long exposure, cause several forms of cancer in mice. There is no data showing it causes cancer in shooters.
Magic elixer of 1/3 Kroil and 2/3 Shooter's Choice bore cleaner. Run a wet patch through the bore (get the bore good and wet), let it sit for a half hour then a few passes with the bronze brush and then a pass or two with a damp patch (same stuff). You'll be amazed at the crud you get out.
For effect, clean your bore your regular way first (get it shiny) then try the above...I was shocked at what came out.
Two approaches to cleaning plastic from barrels have been posted above. One requires only physical abrasion and the other involves abrasion with a solvent that will soften the plastic. A bit of oil can be used as a carrier for the solvents, but oil is not a solvent. I prefer using solvents along with the abrasion. That is the best way to get little black spots on your clothes.
The best I ever found was a product called Free-Gunn Cleaner in an 8 oz spray bottle sold by a company out of Clay Center, Kansas that I picked up at the Grand years ago. It was said to contain petroleum distillates but seemed more like a soap solution and would not harm the wood finish. Sprayed into the barrel it would lift the plastic which would then come out in strings leaving a very shiny clean barrel. Does anyone know if it is still available?
ou.3200- Free Gunn cleaner is no longer available. Frenchie died a few years ago. The stuff was different. It was a water miscible cleaner that required a lot of shaking and then some time to work, but it did work. At one time I knew the active ingredient but that information is now lost somewhere in my head.