When reloading for hunting in crappy weather (I never use handloads for self-defense, being a graduate of LFI-I and LFI-II), I use a small bottle of something called George & Roy's Primer Sealant.
It looks like a clear/blue fingernail polish, with the same consistency and bottle shape.
http://www.cabelas.com/p-0003180210621a.shtml
That is a very useful tip. Thanks.
I'm still puzzled, however, by how much oil JFRuser has slathered all over his carry revolver. If there's so much present that it's actually contaminated his carry ammo, then I'm afraid his bolt face pressures are way high due to oil between the chambered rounds and the cylinder chamber walls. Revolvers don't like ammo that flows brass and/or primers into the firing pin bushing - it'll lock up the cylinder's rotation after just the first round. Not good.
The frame & cylinder are of titanium alloy, so I didn't leave much on the outer surface & wiped it dry. I was, however, generous with the lube on the internals, center pin spring, etc. I think part of my problem was I used old-school Breakfree CLP, which was my preferred cleaner, lube, & preservative for CCW. I suspect the solvent properties might have added to the problem.
The pressure of the 180gr Winchester ammo is likely the
lowest of any of the full-power .357mag loads I tried. Subjectively, there is much less blast and the brass always fell free nice & easy. Several 158gr .357 mag loads would stick in the cylinder, requiring some serious work to get out and the 125gr loads were like a bomb going off, blast-wise, especially to the folks shooting to my sides at the range. Objectively, the primers on the Win 180gr loads were between uh, "soft" and "sharp," definition-wise. Meaning, the pressure wasn't so low that the firing pin left a rounded dent and wasn't so high that there was a precise impression of the firing pin in the primer. Absolutely no intrusion into the firing pin bushing.
I suspect that some CLP came in through the FP bushing and had a good, long, while to work its way in. Toss in temp changes (below freezing to over 100deg) over the year that might expand & contract the brass...
Well, I am not certain of the cause, but it can't hurt to get a little paranoid about CLP near the cartridges.