Luger Definitions~

[Olle]

Originally Posted by sheepherder

There actually is something like that. I don't know the name but it's used in auto engine intake manifolds, acts like Simichrome Polish, and is hydraulically pushed through the inlet & exhaust tracts. Looks like a big stream of toothpaste (which is also a polish) and is endless; the paste is picked up and pushed back through repeatedly. Gives a mirror surface to the passages.

It's called "extrude honing": http://extrudehoneafm.com/. It's a really neat method as it mimics the gas flow, so it tends to remove the restrictions and leave the rest alone. I was thinking about extrude honing a set of cast iron exhaust manifolds for my Chevelle and making them into sneaky "sleeper headers", but the cost was prohibitive.

For guns, there's something called "fire lapping", you shoot a bullet coated with abrasive. You can even buy bullets impregnated with abrasive for the purpose: http://www.midwayusa.com/product/847...ster-box-of-20 . These are made for lapping new barrels, but you could probably clean out a dark bore with them as well. The fire lapping idea sounds a bit like snake oil to me, but it might work.

[DonVoigt]

I have used fire lapping on a new barrel, it basically accelerates the "smoothing" of the bore(this was a target rifle). There was a noticeable improvement in accuracy.

I do not think I would use it for "cleaning". If the bore is not too bad, regular ball ammo will help clean it up for folks too lazy to do it manually.

If the bore is really bad, nothing will help.

Originally Posted by Olle

It's called "extrude honing": http://extrudehoneafm.com/. It's a really neat method as it mimics the gas flow, so it tends to remove the restrictions and leave the rest alone. I was thinking about extrude honing a set of cast iron exhaust manifolds for my Chevelle and making them into sneaky "sleeper headers", but the cost was prohibitive.

For guns, there's something called "fire lapping", you shoot a bullet coated with abrasive. You can even buy bullets impregnated with abrasive for the purpose: http://www.midwayusa.com/product/847...ster-box-of-20 . These are made for lapping new barrels, but you could probably clean out a dark bore with them as well. The fire lapping idea sounds a bit like snake oil to me, but it might work.