[gearbox]

Today I cleaned the barrel of my new GP100. It hasn't been fired since 2002 (so says the serial database) when the proof firing occured.
The grooves in the rifling are visibly rust-colored and can be noticed from aft or forward.
I presume I'm just not leting the Hoppes marinate long enough?
Thanks

[Preacherman]

How long is it supposed to baste??? :what:

I've never considered baste-ing my handguns, but I'm willing to try anything once... just as long as it's not a polymer frame - that would melt in the heat from the oven!

:evil: :neener: :D

[Hal]

Could be copper fouling, and not rust.....

[stans]

Those orange streaks in the barrel are most likely copper jacket fouling. Hoppe's number 9 will very slowly dissolve it, but it will take a long time. A faster solution is to use a copper solvent like Sweet's 7.62. These solvents have a high ammonia content and cannot be left on the gun for very long, but the ammonia dissolves the copper. A word of advice, when using copper solvents, use a nylon bore brush, since the solvent will also dissolve a phosphor-bronze bore brush. Ask me how I know!

[10-Ring]

When I field strip my pistols, I let the barrel soak in Hoppes, clean the rest of the gun & then clean the barrel last.

[larryw]

I'm assuming the gun is blued; you could also be seeing the remnants of the bluing salts (bluing is actually a rust process). Regardless, advice above is good.

Let it marinate overnight before you baste while on the 'Q; yummy and tender. :D

[Standing Wolf]

I've been known to put a rubber cork in the muzzle, fill up the barrel with Hoppe's No. 9 and household ammonia, and let the gun stand muzzle-down overnight. Stinky? Yes. Effective? Very.

[bountyhunter]

Could be rust, or copper. You may also have "flame baked" carbon glaze on the forcing cone end of the barrel. Either way, the fastest way to get it clean is with a NYLON bore brush and some chrome polish. It has a touch of ammonia in it and is designed to remove rust from a mirror finish (chrome) without clouding so it has very low abrasion level. Use the bore brush with no rod. Dip the end in the polish and work it in and out the forcing cone end, scrub as far in as you can. Put it on the rod and work from the muzzle end. I'll wager in less than a minute your bore will be absolutely clean, including the grooves. If not, load up the brush again and keep scrubbing. Run patches to get out the polish then run an oil patch. Done.

[gearbox]

The gun is stainless. KGP141, to be precise. Bought it 7.22, cleaned it 7.24.
Can ammonia-based solvents harm stainless?
Maybe I should plug the barrel and let it soak in #9 for a few hours. Rubber-banding aluminum foil might be a better idea in order to let the solvent contact the extremities.

[Al Thompson]

Actually scrubbing it with Flitz or Gunbrite or the chrome polish is quicker and much eaiser.