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View Full Version : How do you dress up the crown on a rifle barrel?


Daren Thompson
February 19, 2002, 07:01 PM
As some of you know I am in the process of rebarreling a turkish mauser. I am just about to finish up the headspace and install the barrel. I would like to true the crown on this old barrel (if possible) and would like to know what I need to buy and how to do it.

Thanks
Daren

kurt IA.
February 19, 2002, 07:37 PM
Set it up in the lathe just like you would for chambering, and be sure the tool bit is on center. The only trick to a crown is that it be square to the boar an no burs, or get one of the poilted jobs from Brownnells.

Daren Thompson
February 19, 2002, 07:52 PM
What do you mean by piloted jobs? On a lathe do you use a countersink to get the right crown? I really don't know much about this as I have never been exposed to much machine work on firearms, although I do know how to use a lathe and mill. I am just trying different things on this old gun to experiment.

Thanks

James K
February 19, 2002, 11:17 PM
You can do a straight crown with a cutting tool, then bevel the inside. I used to use a tool that was cut to a shallow "U" shape to put on curved crowns like the original barrels. Just run it against one side of the muzzle and let it cut, moving it in until the crown is perfect. The tool is easy to make.

Jim

kurt IA.
February 19, 2002, 11:38 PM
There on page 120 of Brownells Book, one cuts a 79 deg crown and the others are 90 deg. facing cuters. Both use a pilot to guide the cutter,in the bore. I would use the lathe, no derferent than faceing off any thing else. Jims tool sounds good.

C.R.Sam
February 20, 2002, 11:20 AM
Just make sure you are cutting true in relation to the bore, not the outside of the barrel.

Sam

Daren Thompson
February 21, 2002, 06:18 PM
Thanks everybody. I looked at the pilot cutters in Brownells and would like to know what the application difference is between a steel and brass guide?

Thanks
Daren

dfaugh
February 24, 2002, 05:09 PM
I'm not sure what difference would be...maybe tool longevity? BUt I use the Brass pilots, for Mosins and Mausers, good results IF you use cutting oil...Without oil, I get some chatter..Read somewhere about using a Brace, so you can put a little pressure on it (Barrel in vise)...will try that on the next one...