That's the best stuff I ever used for it, too, buzz. I don't shoot tubes anymore in my main comp gun, but did for a number of years. I would put the dirty tubes in the pint jar of Slip2000, tighten the lid, and leave it in my pickup for about a week while I drove it daily on the farm. It sloshed them around as I drove the field roads. When I'd open the jar they would be almost spotless.

A good friend, Charlie Boswell of CompNChoke, was sent a jug of a cotton picker spindle cleaner that the sender said worked great for cleaning choke tubes. He tried it and confirmed that it did. Lot cheaper than Slip2000 but, we never did find out the brand name of the spindle cleaner.

SRH


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