When it comes to muzzleloader cleaning there are an infinite amount of
solvent formulas and techniques. Anyone shooting Pyrodex or most of the faux BP's should use a commercial solvent which can put the Perchlorate
these BP substitutes contain into solution and neutralize it as it's only partially water soluable and steel is actualy somewhat porous and you can
destroy a fine bore eventually quite easily, particularly when you use the Bore butter (or Wonder lube) bore seasoning technique.
With real Black powder plain old cold water works quite well even though it sounds counter intuitive hot water actually contributes to after rusting much more than cold and hot isn't a more effective solvent.
I learned this from a few different older highly experienced BP slug gun shooters ( I was pretty leery myself as I'd always used really hot water
myself)
the best way to dry the bore and get rid of any residual moisture is to
dry patch then run a patch or two saturated with rubbing alcohol which will
combine with any residual moisture then evaporate quickly.
An excellent rust preventative is LPS either II or III, it's what they use as a rust preventative on nuclear submarines, it's extremely effective
much more so than lots of the established gun oil products, when you're ready to shoot again remove the LPS with a patch or 2 saturated with cheap aerosol Brak-kleen or a similar product, the LPS III is best for
really long term storage where cosmolene or rig would normally be used.
It's important to use Brak-kleen or a similar effective solvent to use to
remove any petroleum derived oils as BP fouling and oil can combine to
create a tough hard to remove asphault thats a bitch to remove and
creates fouling difficulties while you're shooting.
For between shots BP solvent or after shooting range clean up Glass plus
or any non ammoniated glass cleaner works great, and if you're shooting every week or a couple of times a week you can skip the cold water flush
as long as you use the alcohol and LPS II after you clean, in a pinch you can also use the alcohol to remove any residual oil in the bore before you shoot, it just takes more patches. A very knowledgeable BP expert
(The Mad Monk) recently said he's using Cider Vinegar as a BP solvent
as it's mild acidity is super effective at neutralizing, breaking down and removing BP residue, which contrary to popular belief is actually quite alkaline, not acidic. Once spring comes I'll switch to Cider Vinegar myself
as this guy has likely forgotten more about BP behaviour and chemistry than I'm likely to ever know. Some of the old standby BP solvents like "Friendship speed juice" Murphy's Oil Soap, alcohol and hyrogen peroxide is extremely effective, but I'll only use it in my BPCR's as it
will seep into the breechplug threads of ML rifles and cause big time corrosion problems, some guys use this stuff but de-breech and use
water proof grease or anti sieze compound on the breech plug threads
a couple of times a year. As long as you're shooting real BP you don't need any of the expensive commercial solvents. fredj