does this crown have a problem?

[chop house]

i was expecting a more symmetric fouling pattern....

rifle occasionally acts erratic... and shoots different bullets to different horizontal points of impact. heavies impact 4 moa right and 2 moa up from lights.... and most groups show horizontal stringing....

 

[prwhite]

Looks like rifleing nearly gone at the muzzle as well as some erosion at the muzzle. Perhaps cutting the muzzle back 3/8- 1/2" and recrowning would fix most issues.

 

[Bill K]

It looks to me, that with the uneven pattern and the inside edge showing the uneven markings and debris sticking there, it seems like yes. I would have a smith take a cut and re-crown it.

 

[joshb]

Yup, that crown is toast.

 

[chop house]

well, 3 votes to none, so i figured i have nothing to lose.... here is <5 minutes with a brass screw and fine valve grinding compound....





i shall report back tomorrow evening... i'll retest before pulling the barrel...

 

[hammerjack]

The barrel looks a little funny in second photo with all the groves

 

[chop house]

The barrel a little funny in second photo with all the groves

savage factory, typical...

 

[dryhumor]

This is my .260 muzzle/crown. As an example.

 

[hammerjack]

Kind of looks different than the standard Savage RR track looking groves. You should get someone to cut it off and put a fresh crown on it and then you will know.

 

[chop house]

This is my .260 muzzle/crown

a thing of beauty....

 

[Oleg S]

I would also check the other end of your barrel...
Maybe it’s time for new barrel.

 

[Ned Ludd]

View attachment 1189019

This is my .260 muzzle/crown. As an example.

You can tell from the pattern...that's a lucky barrel.

 

[dryhumor]

You can tell from the pattern...that's a lucky barrel.

Four leaf clovers have always been lucky!

 

[Bill K]

I would also check the other end of your barrel...
Maybe it’s time for new barrel.

Not so fast. less money to try a new crown, with some barrel cut off and re-crowned, then shoot for grouping, etc. then if it does not improve and get the job done, then a new barrel might be considered.

 

[M14AMU]

It’s been beat to death with cleaning rod reversal or because it’s been put barrel down into floorboard of vehicle!

 

[Hohn]

https://www.brownells.com/gunsmith-...amers-muzzle-crown-refacing-kit-prod7718.aspx

 

[dolek]

It’s been beat to death with cleaning rod reversal or because it’s been put barrel down into floorboard of vehicle!

How do you know this ?

 

[dolek]

https://www.brownells.com/gunsmith-...amers-muzzle-crown-refacing-kit-prod7718.aspx

Do you have experience with that tool ? If so, please let us know your thoughts . Thanks

 

[ebb]

How do you know this? Cause those are the things that ruin a crown most frequently.

 

[dolek]

How do you know this? Cause those are the things that ruin a crown most frequently.

That make sense now that ya mention it , I knew a guy that never got out of the truck...maybe that's why he was such a bad shot,bad crown ?