HOW to re-crown a barrel?.....

[DYNOMIKE]

Aside from the obvious specific purpose Cutter what other ways can this be done while still obtaining good results?..

Think I want to try this myself on one of my FAL barrels..

TIA... :beer:

[Forrester]

get a marble and some emory/sand paper and start twisting the the paper wrapped marble in the crown. It works amazingly well and all thanks for the idea goes to Gary!

[DYNOMIKE]

I'm impatient so I did what I could with what I had on hand...
Muzzle crown just looks like Dookie to me, but much improved I think...
I ran a Patch down the barrel and unscrewed the jag to keep any crap from going down pipe.....

A marble & 400 Grit Sand Paper seemed to work pretty well...

BEFORE:

http://i275.photobucket.com/albums/jj295/DYNOMIKE_photos/P3150155.jpg

AFTER:

http://i275.photobucket.com/albums/jj295/DYNOMIKE_photos/P3150158.jpg

http://i275.photobucket.com/albums/jj295/DYNOMIKE_photos/P3150159.jpg

[FAL GRUNT]

Send it to me for a cut, crown, and re-thread.

:biggrin:

-myers

[Alien1]

Chuck a panheaded machine screw up in a drill add some metal polish and press straight in on the crown. Does an excellent job and just takes under a minute

[indy_Muaddib]

+1 on the carriage bolt (pan head screw)

turned a keyholding type 56 mosin into a fantastic rifle in under 2 minutes.

[DYNOMIKE]

Sounds easy enough, if my first attempt does not work I'll do that next..
I can use the Screw/Bolt and some JB Bore paste or Valve grinding compound..

Thanks..

[Gazz]

For the screw method, use a brass screw as it will hold the abrasive better since it is softer than the steel of the barrel. (The same concept is used to drill holes in glass - a brass tube to hold the abrasive.) I use valve grinding compound.

I have also used what are called mounted points or the small grinding tools for die grinders or dremel type tools. If you use these in a power tool, they will remove lots of material quickly so be careful.

[BlasterLP]

DynoMike....I am surprised no one has told you to search out and try W.E.G's booger pickin method!

At least I think it was W.E.G.'s???

just use your finger and a piece of fine sandpaper or if I remember right, emery cloth and go to 'booger pickin' .

[L Haney]

Originally posted by Gazz
For the screw method, use a brass screw as it will hold the abrasive better since it is softer than the steel of the barrel. (The same concept is used to drill holes in glass - a brass tube to hold the abrasive.) I use valve grinding compound.


I've used hardwood dowels, mineral oil and fine sand to drill glass. Putty dam to hold the sand/oil, dowel in the drill press, and a "pecking" motion on the vertical feed to refresh the abrasive at the contact end. Done 1/2" plate like this too.

Crowning isn't difficult IF the muzzle is square before you start. If it ain't, you're wasting your time.

[Eric Bryant]

I've used a glass marble and lapping compound to clean up a nicked crown.

The idea of substituting a panhead screw or carriage bolt seems pretty sound, and I might give that a shot the next time the need arises.

[randy762ak]

Im always saving odd things ..One of them is ball bearings out of busted up machinery.
I took a section of 5/16 and 3/8 steel fuel line and cut off the flair end soldered a different size ball to each tube and they make great crown lappers a tiny touch of lapping compound and you can spin the tube between your palms like grinding a vale.
a 12 in tube and you can solder a ball on each end !

[DrDuc]

The brass screw and valve grinding compound works so well I never did anything else. Been using it 30 years.

[W.E.G.]

http://i227.photobucket.com/albums/dd7/rkba2da/WECSOG/02_dremel_muzzle.jpg

[elbo]

Gary, that's a LOT of sparks off of your thumb nail. :eek:

[FNfreak]

Mike,
A RCBS deburring tool, chucked in a drill or mill works too (hand drill works for the really impatient)!!!!!!!! DO NOT ASK ME HOW I KNOW THIS!!!

:uhoh:

[DYNOMIKE]

Originally posted by FNfreak
Mike,
A RCBS deburring tool, chucked in a drill or mill works too (hand drill works for the really impatient)!!!!!!!! DO NOT ASK ME HOW I KNOW THIS!!!

:uhoh:

LOL!!!!
I just had to "WAIT" until I tested my Home-brew re-crown before I commented. :beer:

To be honest I did just that although I did not use a drill but did it by hand..
Once I was happy with the job I did with the RCBS Tool I switched to a MARBLE and sandpaper..

Guess what?
It fuggin WORKED!!!!

I'm pretty fuggin pleased but now I wonder "IF" it may be even better with something like an 11 deg. crown actually cut with a tool specific to the task?