I use regular Kroil mixed 50/50 with Shooters Choice to clean my barrels. I usually run a couple of wet patches and let it sit a spell before running clean patches through. Seems to do a good job of getting all the fouling out, especially in my .17 HMR.
Get the liquid stuff in the can.
I've never heard of the penephite kind; from the name it sounds like it might have graphite in it. The aerosol I've seen is called silikroil; it has silicone in the formula.
The variants seem to have some anti-friction type component. Kroil ("the oil that creeps") is basicly a solvent-based penetrant/lubricant that quickly loses it's lubricity as the silvent evaporates, taking most of the "oil" with it.
It's great for cleaning bores, I like 50/50 Kroil/Shooter's choice copper solvent for my standard bore cleaning; for break-in of new bores I add an equal amount of GM top cylinder lube to the 50/50 mixture.
Keep the solvents capped when not in use or they lose potency.
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