Yesterday I ordered a .22 rf. cleaning rod and guide from Bore Tech. During the conversation, the gentleman who was helping me, mentioned a cleaner that they have specifically formulated for dealing with rim fire residue. According to him, it is quite different from centerfire fouling. I did order some for this new barrel. I just pass this info along because I was unaware there was so much more abrasive grit in rimfire priming. Good shooting, all.
This stuff, IMHO, has been the go to solvent for rimfire for years.
It is the best.
