What is this on my muzzle crown, and how do I remove it?

BeaverMeat

BeaverMeat

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To my knowledge it looks like caked on powder residue. But I need clarification.

It used to be much worse as I could actually feel the roughness of it. I gave the rifle a good cleaning and it seems the solvent run off removed some of it.

So how do I go about cleaning it off with out damaging the crown?
 
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Nothing really. Just a little light corrosion. Maybe a little scotch brite or fine sandpaper. Tons of my rifles have this. Not an issue for functionality.
 
I have never seen it before on any of my rifles, so it's new to me.

Scotchbright, sandpaper, and steel wool seems like a sure way to f@ck up a crown. Any more bright ideas?
 
Magellann said:
It looks like powder residue to me.
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I'm with him. The bore is almost mint, no sign of corrosion and minimal erosion. Just this on the muzzle. You can see absent spots where the land ends at the crown. The majority of it is dispersed around the groove.

anyone else have any constructive input?
 
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BeaverMeat said:
I have never seen it before on any of my rifles, so it's new to me.

Scotchbright, sandpaper, and steel wool seems like a sure way to f@ck up a crown. Any more bright ideas?
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Why? Where that is, is not near the crown? The crown is only adjacent the lands and grooves. But if you know better why did you ask?
 
davemccarthy707 said:
Why? Where that is, is not near the crown? The crown is only adjacent the lands and grooves. But if you know better why did you ask?
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Good point. I'm just paranoid about screwing it up. I already have an other k98 with a messed up crown. I asked for clarification, I'm not an expert. A comparative image would help in determining what it is exactly.
 
BeaverMeat said:
Good point. I'm just paranoid about screwing it up. I already have an other k98 with a messed up crown. I asked for clarification, I'm not an expert. A comparative image would help in determining what it is exactly.
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Seriously, forget about it and shoot the rifle. It is a non-issue. It is minor corrosion discoloration. If it really bothers you, just hit it with some scotch brite and then oil it. Just dont go near where the grooves meet the barrel. Otherwise just oil it and forget it.
 
davemccarthy707 said:
Seriously, forget about it and shoot the rifle. It is a non-issue. It is minor corrosion discoloration. If it really bothers you, just hit it with some scotch brite and then oil it. Just dont go near where the grooves meet the barrel. Otherwise just oil it and forget it.
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Thanks for the tip. I will be taking it out once this snow decides to melt.
 
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It's blowback from the gas that was pushing the bullets.

When the bullet leaves the muzzle, the pressure in the bore in "uncorked". Gas follows the bullet but begins expanding immediately.

When hot gas expands suddenly, it COOLS: basic refrigeration principle at work.

The gas is carrying CARBON in a gaseous state. This then PLATES on your crown as it cools.

It's all over in about 1/5000 of a second.

You can take it off by a CAREFUL application of Extra Fine steel-wool, taking care NOT to get the stuff into your bore.

THEN you clean your Bore normally.

Hope this helps.
 
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