When I use 777 at the range & just fired my last round, I loosen the breechplug of my Omega several turns- then run a 3"oily patch down the bore that's inside a small spray bottle I carry around.

I now have two weeks to clean that ML.... so really, there's no hurry!

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If I'm using a sidelock, instead of unscrewing the breechplug, I loosen the nipple one complete turn & spray oil on a 3" patch. I will wipe all around the nipple area - then run a patch of oil down the bore -- again, that now allows me two weeks to clean that ML.

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Thompson Center Arms -- Triple Se7en Powder -- Buffalo Bullet Co.