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.
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References in periodicals archive ?
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.
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.
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.
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.