Author Topic: Was just wondering...how many of you  (Read 1860 times)

Offline CharlieDaTuna

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Was just wondering...how many of you
« on: August 20, 2006, 07:14:45 AM »
have had to recrown your barrel and what method did you use?? What gun and what about the results???
Bob  aka:  CharlieDaTuna
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For us newbies out here...
« Reply #1 on: August 20, 2006, 07:28:42 AM »
could you briefly explain what recrowning a barrel is?

thanks!

Offline CharlieDaTuna

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OK...Here ya go youkilis
« Reply #2 on: August 20, 2006, 07:56:43 AM »
On my website is an article regarding crowning that is very informative that will give you an understanding of it.

http://www.charliedatuna.com/airgun_docs/Barrel%20Muzzle%20Crown%20Procedure.doc

In many cases, the muzzle crown is probably one of the biggest yet least understood and considered issues regarding accuracy in the inexperienced shooters. The crown issue applies  especially in the "lower to mid class" class guns where tolerances sometimes leave a lot to be desired. The higher price guns are usually not a problem and have very good barrels although many competition and precision shooters  recrown them to perfection anyhow.

All you need is good light and a decent magnifying glass to determine how good/bad it is for the most part but taking the time to do it can be well worth the effort. Once done, unless it is somehow damaged, it never needs to be done again.

Recrowning in itself is not difficult but must be done with considerable care and accuracy to get the desired results. The results can be truly amazing though, especially if all other considerations for the guns accuracy have been addressed.

Hope this helps

next...
 :)  :p  8)
Bob  aka:  CharlieDaTuna
Co-founder of the GTA


HOME OF THE GRT-III TRIGGER
   Website:  http://charliedatuna.com/

Home of the NPSS-NP Triggers:  
            http://charliedatuna.com/NPSS.htm

E-Mail:  CDT22@Verizon.net

Benji-342 .177 /Brazilian Winchester 800 .22 /Gamo Cadet .177 /Gamo Shadowmatic .177 /Gamo 440 .22 /Gamo Royal .22 /Gamo Whisper .177 /Gamo SK-1 .20 /B-20 .177 /TF-99 .177 /QB-78 .177 /QB-78t .22 /QB-78-(CD) .22 /QB-78-(CJ) .22/QB-78D .22 /Crosman 2240 .22 /Cros 150 .177 /Crosman Back Packer .22 ?Crosman AS 2250 .22 /Daisy Mod 93 .177 /Marksman 2004 .177 /GS 35 .177 /FWB-124 .177 /Custom Marauder .22 /Custom Disco .177


Offline daved

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Re: Was just wondering...how many of you
« Reply #3 on: August 22, 2006, 03:40:24 PM »
Hey, Bob, does this mean you're going to check the crown on my CFX while you have it :)?  Actually, I intend to check it when I get it back from you, once I figure out how to get the muzzle brake off.  I'm seeing some nice looking brakes out there, and its getting me motivated to make one for my gun.  Especially after I get it back from DaTuna!  Later.

Dave

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Re: Was just wondering...how many of you
« Reply #4 on: August 22, 2006, 04:43:55 PM »


Well, I have participated in crowning of a lot of barrels many way. First is the old standby : the lathe. results as usual very good .



Next I seen a re-crown job done by the same gunsmith, with a hacksaw, file, and a ball-bearing. The end of the barrel was cut with a sharp hacksaw. Then the surface was trued and smoothed with a good mill file. Then the finishing of the crown was done with a ball-bearing and lapping compound. The results was just as good as the crown done on a lathe. But a lot more time and attention to detail is required! The barrel was a couple of heavy varmint barrels. This was to show me it could be done, and also some benchrester actually use this method to " clean up" their crowns!!



Finally the last crowning method is done by a specialize "crown cutter" this was done on some service revolvers. When done correctly this had respectable results also So depending on what resources you have available to you or how much you are willing to invest. There are options you can choose from