Never saw this before...

[Hotshot]

Help me out.  Does anyone know what this is?  It's near the muzzle on an old Rem700 .30-06, the rest of the barrel looks clean with a bore scope.

 

 

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[ArmyBrat61]

Looks like somebody was alittle rough with a cleaning rod?

[Fourtyfive]

My thoughts as well ...

[Omega]

Looks like gas cutting. It happens when there is a slight imperfection in a land or groove allowing the hot gasses to go around the bullet before exiting the barrel.

[RED333]

Does it shoot well, hold groups well? if not,

time to cut the end off and have a new crown put on.

[Omega]

Does it shoot well, hold groups well? if not,
time to cut the end off and have a new crown put on.

I cant imagine it would; I would cut that inch or two off anyway, it will just get worse.

[Hotshot]

So, someone could have damaged it with a jag or rod and gas did the damage you see in the picture.  I'll buy that.  I have not shot the rifle, knowing it would not shoot well. The damaged area is higher than the land which could raise pressure in that area.  I bought it with the idea of cutting it down two inches.

[RED333]

I could not tell if it was on top of or below the land, on top of is a "sure cut and recrown".

You can buy the tools to do this youyr self, might even be able to rent them.

Here is a home grown way.

http://www272.pair.com/stevewag/muzzle/mz.html

[Garufa]

Shoot it and report back.

[graycrait]

I'll go out on a limb and say if it shoots the way you want it to then forget it.  However, if it will still be legal length I would not hesitate to cut it off with a hacksaw and use a carriage bolt and valve grinding compound to put another crown on it. 

[Randall53]

"I would not hesitate to cut it off with a hacksaw and use a carriage bolt and valve grinding compound to put another crown on it."

 

Hacksaw? Crap, if I cut it with a hacksaw damn thing would whistle at you every time you shot it......

Edited August 25, 2014 by Randall53

[Omega]

"I would not hesitate to cut it off with a hacksaw and use a carriage bolt and valve grinding compound to put another crown on it."
 
Hacksaw? Crap, if I cut it with a hacksaw damn thing would whistle at you every time you shot it......

You would be surprised how easy it really is. If really worried about it get it to a smith but a miter box and a hacksaw does a decent enough job, crowning gets rid of any imperfections in the cut. See if this link works:
www.youtube.com/watch?v=b43odFm0mrI

If not, cut and paste it into your browser or google: "midway cut crown barrel YouTube" you will see how easy it is.

[Hotshot]

When I ordered the crown cutting tool, I saw the the MidwayUSA/Potterfield video.  Looks like fun.  I'll end up with a 20" 700 BDL.

[peejman]

You would be surprised how easy it really is. If really worried about it get it to a smith but a miter box and a hacksaw does a decent enough job, crowning gets rid of any imperfections in the cut. See if this link works:
www.youtube.com/watch?v=b43odFm0mrI

If not, cut and paste it into your browser or google: "midway cut crown barrel YouTube" you will see how easy it is.

 

Note that the primary purpose of the crown is to protect the rifling from damage should you whack the muzzle on something.  A flat muzzle that's square to the bore and deburred will function just fine. 

 

That said, you don't know if it has accuracy problems until you shoot it. 

[Omega]

Note that the primary purpose of the crown is to protect the rifling from damage should you whack the muzzle on something.  A flat muzzle that's square to the bore and deburred will function just fine. 

 

That said, you don't know if it has accuracy problems until you shoot it. 

Yes that's right, but for a non smith its easier to crown the barrel instead of deburring the rifling properly.  I have a 303 brit which had an almost unperceivable burr in the rifling which made it shoot quite erratically, a friend (gunsmith) showed me the DIY method to re-crown it and now shoots much better. 

[Dolomite_supafly]

You might be surprised at how well that thing shoots. I have seen barrels in a lot worst condition actually shoot pretty well. Look at any Savage barrel and you will be like OMG but they are known to be very accurate.

[Wingshooter]

When I ordered the crown cutting tool, I saw the the MidwayUSA/Potterfield video.  Looks like fun.  I'll end up with a 20" 700 BDL.

A 20" 30-06 700BDL will be a handy tree stand rifle for TN. Should turn out nice

[peejman]

Yes that's right, but for a non smith its easier to crown the barrel instead of deburring the rifling properly.  I have a 303 brit which had an almost unperceivable burr in the rifling which made it shoot quite erratically, a friend (gunsmith) showed me the DIY method to re-crown it and now shoots much better. 

 

 

I guess I figured a few bullets would do an adequate job of deburring the muzzle. 

[Omega]

I guess I figured a few bullets would do an adequate job of deburring the muzzle.

Probably would eventually, but in my younger days I was a bit impatient. But it was a win-win, the 303 shoots much better and I learned a new trick. I've only used it twice since then, and both were not mine but I did get to put the info to good use.

[Hotshot]

Thanks to all!

[gregintenn]

I'd shoot it before I cut it. I have an old Winchester, and the bore looks like a sewer pipe, but it shoots about as well as any rifle I own. You never know.