I have a problem that has perplexed me for the last three years concerning the Ruger Mark IV Target .22 LR pistol I shoot for Steel Challenge competition and just ringing steel for fun. In cleaning this gun over the last three years, I have yet to come out with a clean patch at the end of my cleaning sessions.
Rimfire firearms don’t immediately come to mind when one thinks of SIG Sauer, a company that prides itself on its tactical guns. But while .22 LR firearms aren’t a major part of SIG’s DNA, it hasn’t ignored them, either.
While a thorough cleaning should be enough to eliminate stubborn rimfire brass from failing to eject from a .22 LR Colt Diamondback, soaking the chambers with a penetrating lubricant like Kano Kroil should remove any leftover firing residue and restore positive extraction.