metal fouling

metal fouling

[′med·əl ‚fau̇l·iŋ]
(ordnance)
Deposits of metal that collect in the bore of a gun, coming from the jackets or rotating bands of projectiles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Problems arose with the new rifle almost immediately, most attributable to the Cordite, which produced severe muzzle blast, flashy overheating, metal fouling, recoil and barrel erosion.
Hoppe's aim was to develop a product that would remove all primer, powder, lead and metal fouling from the bore while, at the same time, protecting it against rust.
The combination works well on plain old metal fouling, too.
There aren't very many pistol cartridges that leave significant amounts of metal fouling in the bore, so unless the bore is badly fouled, there's no need to clean it before shooting lead bullets.
Briggs recommends a number of products to remove metal fouling, including Brownell's JB Bore Cleaning Compound and Lewis Lead Remover, Hoppe's Copper Solvent, Shooter's Choice MC#7 Bore Cleaner and Conditioner, plus others.
This is an aerosol solvent that removes lead powder and metal fouling. Because it is an aerosol, the chemicals stay fresh and do not get contaminated with impurities from prior cleanings, nor do they evaporate as can happen with bottled solvents.
Barnes CR-10, Hoppe's Benchrest, Shooter's Choice, Terra Gun Copper Solvent, Sweets 7.62 and others are ammonia-based solvents that really clean our metal fouling but they must be used as directed.
The heat and pressure of the firing presses the ceramic particles into any tiny imperfections in the bore, smoothing the surface so much that metal fouling is greatly reduced or even eliminated.
Metal fouling is still with us, though not in the same lumpy form as in those "halcyon" pre-war days of cupro-nickel jackets.
Every shot leaves a trail of carbon, copper or lead, so you have to attack the carbon layers to get at the metal fouling. That's the strength of the Elite line.
I've found that gilding metal fouling appears quite soon in the Contender barrels.
I've found it to do a good job of removing metal fouling without being so aggressive as to be difficult to use somewhere that you can't wash your hands.