Soaking the bore - how to plug it?

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Amazon has black rubber lab stoppers. Ideally just order the size you need for your bore, but it may be necessary to order an assortment. Cured rubber is very resistant to chemicals. And lab stoppers are deigned to be used with aggressive chemicals. As a chemist with 50 years experience, that is what I would do. You could test the stopper first overnight in the cleaner you use. If it swells, you don’t want to use it.
 
I always keep the tapered tip that comes with a tube of RTV or the like for just such reasons.
 
Liberally coat the outside of an empty .22 case with whatever grease you have on hand and insert it into the chamber. Fill the bore with whatever. The fluid probably will not be heavy enough to push the greased case out of the chamber, but you can close the action if it worries you. Stand it vertically so that if any leakage occurs it will not flow into the stock, or cause a carpet stain.

I clean my 1873 lever action .357 this way, sloshing a half barrel full of solvent around in there to get rid of blackpowder fouling. Never experienced leakage into the action, hope it works for you.
 
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Put the muzzle into a finger of the nitrile glove and tape/rubberband it tight. Take a bronze brush on a rod chucked into a cordless drill and slowly go down and back a few times.

That's the worst advice I've read in a while. That's more likely to ruin a rimfire bore than anything else. The steels used in most rimfire barrels are very soft.
 
"Never cork up the bore"

Meaning, don't seal the bore at both ends.

The concentrations of anything that might be considered even mildly corrosive are very low in Hoppes #9.
I have stood rifles up in a corner filled with Hoppes #9 with the chamber "corked" for a week or more.
I also sealed off the nipple of a .50 caliber muzzleloader and left it filled with Hoppes #9 for a week once, since it had been in use for 20 years.
Never experienced any corrosion or damage from the process.
 
Label is from what i am current using. Bought a case of it, years ago. Maybe its now collectible? :D

The composition is current for Hoppes.
 
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Who the heck still uses Hoppe’s?!? For light to moderate lead I use Montana Extreme Cowboy Blend with a stiff nylon brush, any worse and it gets a wet patch of CLP followed by the Chore Boy.

Rifle cleaning should not be a 24 hour sport. If your solvent takes hours you’re using the wrong stuff.
 
Who the heck still uses Hoppe’s?!? For light to moderate lead I use Montana Extreme Cowboy Blend with a stiff nylon brush, any worse and it gets a wet patch of CLP followed by the Chore Boy.[/QUOTE

Many people use Hoppes, obviously.
However, there are a number of other bore solvents with trendy new names that are formulated much the same and work about the same.
A stiff nylon bore brush is worthless in my opinion for anything other than regular cleaning.

I ran across this comparison of Hoppes, CLP, and Ballistol.

Hoppes won.

 
Rifle cleaning should not be a 24 hour sport. If your solvent takes hours you’re using the wrong stuff.

This. ^

Personally, I’d just use foaming bore cleaner. Tilt the muzzle end downward slightly. You won’t believe the crap that comes out.

If anybody scrubbed the bore of my rifles with a drill powered scrub brush, they’d get the butt stock across their face. Might as well just run a grinding wheel down it.
 
Bore Tech “Eliminator” - I am an old guy that has used all of the old stuff - Bore Tech will clean you barrel with just the normal “wet patch thru the bore” process in very short time. I do not understand why gun owners still use the old stuff - way too much work, mess and smell. Bore Tech is simply impressive.
 
I have left barrels wet with various solvents for several days, no scrubbing, just wipe out the old and apply fresh. I have one of those Sinclair chamber plugs for .22-250 but seldom use it.

My Difficult Pistol Barrel treatment is a tall skinny olive jar full of "benchrest blend" (Shooter's Choice + Kroil.) Three days in that makes a 1911 barrel easy to clean, whether lead or copper fouled. Doesn't do much for a case of plastic fouling from poor "poly moly" coating, though.
 
I don't, I open the olive jar only in desperation.
My regular solvents are M-pro 7 and Wipe Out foam.

I bought some PB Blaster but it is so rank I only use it in the driveway.
 
I don’t normally soak bores, but I do soak my muzzleloader. I took a razor blade to a large eraser and that works well for me.
 
Label is from what i am current using. Bought a case of it, years ago. Maybe its now collectible? :D

The composition is current for Hoppes.
It used to be called nitro solvent because it contained nitrobenzene. That had to be removed due to carcinogenicity. They don’t have “Nitro” on the label anymore. That is how you can tell your stuff is not current. If I were you I would dispose of what you have left at a hazardous waste facility and buy some new stuff.

The MSDS may be current but it does not correspond to what you are using. The main way to know that is there are not 9 ingredients. Ya’ know, Hoope’s #9!
 
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