Glock muzzle damage question

[Cluster F]

Hey quick question. I don’t know if I never noticed this or between range trips something happened. No clue. But my muzzle around the crown is damaged. It’s hard to get a picture of but do you think this will affect accuracy and I should replace the barrel or ignore it and chalk it up to use. It’s hard to get the camera to focus in on it

 

[kingfisher]

If the rifling isn't messed up, it should be ok.

 

[milktree]

Are you sure it’s damage and not crud?

Give it a good cleaning and report back.

 

[M1911]

If it is actually damaged, any gunsmith can recrown the barrel for $50 or so.

 

[GlockBy]

Hey quick question. I don’t know if I never noticed this or between range trips something happened. No clue. But my muzzle around the crown is damaged. It’s hard to get a picture of but do you think this will affect accuracy and I should replace the barrel or ignore it and chalk it up to use. It’s hard to get the camera to focus in on it

What rounds did you shoot? How did it shoot?

Looks like lead deposits or other crap to me, not damage. Gently scrape that area with brass scraper, brush, or empty brass case and see what happens.

 

[Cluster F]

Are you sure it’s damage and not crud?

Give it a good cleaning and report back.

It’s def not crud. I noticed it as I was cleaning it. It’s damaged metal

 

[Cluster F]

What rounds did you shoot? How did it shoot?

Looks like lead deposits or other crap to me, not damage. Gently scrape that area with brass scraper, brush, or empty brass case and see what happens.

I’ll try that

What rounds did you shoot? How did it shoot?

Looks like lead deposits or other crap to me, not damage. Gently scrape that area with brass scraper, brush, or empty brass case and see what happens.

I’ll try scraping it and see if it’s not damaged metal. I’ll add a pic of what I was shooting. If it is metal I guess I’ll just have it re crowned

 

[55_grain]

Looks like lead? Not generally recommended for Glock factor barrels because of the potential for fouling and increased pressure. Clean the crap out of it, then go shooting again. If it still looks damaged, but shoots fine, just keep shooting. If your group size has suddenly doubled, then sure, get it recrowned...or just get an extra barrel.

 

[Cluster F]

Looks like lead? Not generally recommended for Glock factor barrels because of the potential for fouling and increased pressure. Clean the crap out of it, then go shooting again. If it still looks damaged, but shoots fine, just keep shooting. If your group size has suddenly doubled, then sure, get it recrowned...or just get an extra barrel.

It was this. It wasn’t lead. I’ll go back and try to clean the crap out of the barrel.

 

[GlockBy]

It was this. It wasn’t lead. I’ll go back and try to clean the crap out of the barrel.

Still, it is FMJ, not TMJ. So at the base you have exposed lead. Is the gun ported or C-model?

Again, GENTLY scrape one of the blobs first with brass tool or case, if you can move or scratch the blob - it is lead.

Don't go extra hard from the get go, as it is near crown. You wont likely damage anything anyway, but use least amount of force, good solvents should help.

 

[Cluster F]

Still, it is FMJ, not TMJ. So at the base you have exposed lead. Is the gun ported or C-model?

Again, GENTLY scrape one of the blobs first with brass tool or case, if you can move or scratch the blob - it is lead.

Don't go extra hard from the get go, as it is near crown. You wont likely damage anything anyway, but use least amount of force, good solvents should help.

Yea it’s a C model. Thanks for the help

 

[rogersmithiii]

Damage to a crown can cause huge issues with accuracy. That's why the experts advise cleaning from the breach instead of the barrel.

 

[GlockBy]

Yea it’s a C model. Thanks for the help

Well, that explains it. Now I am 100% sure it is lead. You port is likely cutting the jacket or plating on that bullet and you get escaping gas melting, blowing, and depositing lead on the way out. It looks like dirty spots line up with the port positions if you follow the grooves.

Things to look out for - groups opening up, extra target holes from jacket fragments or said fragment stuck in the target, complete jacket separation and keyholing. Crown getting dirty in the process would be a symptom, not a cause.

Solutions: find the ammo that it likes (maybe thicker jacket, TMJ, Syntech, etc.), live with it as is, or get a stock non ported barrel and shoot whatever ammo you like (quality). If this gun is used for defense duty, and you keeping "C" barrel, test to make sure stuff like that does not happen with your defense rounds.

 

[Cluster F]

Well, that explains it. Now I am 100% sure it is lead. You port is likely cutting the jacket or plating on that bullet and you get escaping gas melting, blowing, and depositing lead on the way out. It looks like dirty spots line up with the port positions if you follow the grooves.

Things to look out for - groups opening up, extra target holes from jacket fragments or said fragment stuck in the target, complete jacket separation and keyholing. Crown getting dirty in the process would be a symptom, not a cause.

Solutions: find the ammo that it likes (maybe thicker jacket, TMJ, Syntech, etc.), live with it as is, or get a stock non ported barrel and shoot whatever ammo you like (quality). If this gun is used for defense duty, and you keeping "C" barrel, test to make sure stuff like that does not happen with your defense rounds.

Thank you for the help