How to get rid of stubborn chamber rust?

D

D3vin

CGN Regular
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Hi.

Very recently bought a mossberg 590A1. I went over the gun and found some rust in the chamber. I put some 0000 steelwool/oil to it which helped somewhat.
Is there any other means to remove this crap from the chamber?


thanks for the help.

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I’ve got 2 590A1’s and had the same minor issue, and a minor issue is all it is. I’m assuming you’ve cleaned the barrel already so put rounds through it followed by a thorough cleaning and leave the barrel wet before putting it away. Next time out just dry the barrel, repeat the firing & cleaning procedure, and the surface rust should be gone by then. Remember, it’s a workhorse so excessive pampering isn’t necessary.
 
I have polished my chambers by taking a 12GA brass brush and wrapped 000 wool around it a couple of times. Take the brush, screw it into the last cleaning rod and chuck the rod into your drill. I spray the wool with any cleaning oil -or in my case Liquid Wrench, I love the stuff- and spin it in the chamber at medium speed.
 
After cleaning treat it with G96 Gun Treatment. It also helps if you leave the action open so air can circulate. If you are shooting trap and after a round close the action and set the gun in a rack, as the warm barrel cools moisture forms and settles in the chamber area...
 
Following the 2013 High River flood, after the residents were allowed into their homes, I had 28 firearms come to my shop within 2 days for preservation/restoration. Needless to say, it's a daunting task so first order of business was to soak chambers and bores in WD40. Once each firearm that seemed salvageable (some showed no hope), I cleaned up the WD40. Then I soaked the bore and chamber with "Evapo Rust". I cut small strips of fine Scoth Brite pads that I attached to a 12gauge plastic loop. Using a cordless drill at slow speed, worked the chamber rust out of there. Cleaned, dried and treated with G96. One of the guns that I restored was a 7x57AI formerly owned by the famed P.O. Ackley.
 
A cordless drill, a rod, and an oversize brass brush works well for any chamber along with a quick shot of wd40. Use a 10g brush for you 12g chamber. A .410 brush is good for many rifle chambers.
 
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