Author Topic: Barrel crown (Read 742 times)

a45gunslinger · « **on:** March 10, 2006, 06:41:19 AM »

Have any of you beveld or chamferd the crown on your barrel.. I wonder if this would help to protect it??- Kevin

quickdtoo · « **Reply #1 on:** March 10, 2006, 06:48:04 AM »

As far as I know, all H&R/NEF rifles come with a recessed target crown, no need to do anything to it unless it has a defect which the factory will fix for ya. I have touched up a crown or 3, one was on my 17hmr Sportster, that was a tough one due to the small bore...

Tim

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

mitchell · « **Reply #2 on:** March 10, 2006, 08:45:38 AM »

just don't stick it in the dirt

Datil · « **Reply #3 on:** March 10, 2006, 11:07:14 AM »

Is that what you did Mitchell?

When are you going Off to war?
Marv.

a45gunslinger · « **Reply #4 on:** March 10, 2006, 07:48:42 PM »

I wonder how square the crown is to the barrel from the factory??

cheatermk3 · « **Reply #5 on:** March 11, 2006, 03:46:15 AM »

Here's a way to tell if your rifle's crown has a problem:

Clean the muzzle off real good so that it shines, then shoot 10-15 rounds. Open the gun and set it on a rest or something so you can examine the crown.

Look closely at the muzzle, there should be a star-shaped pattern on it. This pattern is made by propellant gasses depositing fouling on the muzzle's surface as the heel of the bullets exited the bore.

This pattern should be even, sharply defined and centered on the bore. If it isn't, you have a less-than-perfect crown. If the "petals" of the star are not of equal length, or if the pattern itself is off-center, it could be that the face of the muzzle is not plumb with the axis of the bore. This can affect the bullet's stability and consequently it's flight. If the pattern is fuzzy anywhere it could be a burr or other roughness in the surface of the muzzle/crown, like a burr.

Anyway, analyzing this fouling pattern can tell you alot about your rifle's crown

HTH
Mike

quickdtoo · « **Reply #6 on:** March 11, 2006, 04:49:35 AM »

Here's pic of what Mike's talking about...

Varmint Al's .17hmr Bullberry barrel

http://www.varmintal.com/17hmr.htm

mitchell · « **Reply #7 on:** March 12, 2006, 03:46:20 PM »

Quote from: Datil

Is that what you did Mitchell?
When are you going Off to war?
Marv.

i go off to basic (no war just yet) on the 11th of april

and no i'm very careful with my crowns

a45gunslinger · « **Reply #8 on:** March 13, 2006, 02:00:15 AM »

Thanks guys, I'll take a look - Kevin