This has probably been addressed in a previous thread but please indulge me. My new-to-me 340PD has dark marks on the outside of the cylinder from being shot (I'm NOT talking about the rings on the front of the cylinder face). I use Hopps or other things on my steel cylinder guns but have heard that will damage the titanium 340PD, and the info that came w/the gun from S&W isn't much help. Can someone give me some guidance?
Thanks,
Thanks,
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