Crowning 5.45 Barrel?

[Jubb 0]

So I was wondering if anyone has crowned their barrel?

 

I've read about other guys doing it to the .308, and I don't know about you but the factory job on my muzzle is pretty rough. I have a couple nicks in the crown that I'd like to take out.

 

Anyone noticed any accuracy increases over stock?

 

I'm just going to do the ol' wood screw/valve grinding compound trick and see how she does.

[cobravenom39 17]

Tag. I'd like to know as well....

[jr612 0]

I have crowned other rifles using this method.

 

http://www.youtube.com/watch?v=OorpZlG28fI

[jamesavery22 54]

#1 make sure the muzzle is actually damaged. The very tip of the barrel can be knicked. No biggie. If the front of the muzzle where the cut is angled(where the chrome usually starts) is fine then leave it be. That angled cut of the face of the barrel is designed to protect the bore.

 

Ew to that crowning video...

 

Obviously most aren't going to press out their barrel, strip it, and crown on a lathe. That's how it should be done though...

 

What most people can do is use a muzzle cutter: http://www.brownells.com/.aspx/cid=11254/psize=48/Products/Barrel-Chamfering-Cutters

 

The 79° and 90° should be used. 79° to have that protective angle cut for the bore then the 90° to square up the end.

Then don't forget to refinish the bare steel(not the chrome).

 

 

Probably be a good idea to take a macro pic of the face of your bore. Post it here and lets see how good/bad it is.

[jr612 0]

So does it really matter if the barrel or the brass ball (screw) is spinning, both have the same effect.

[mancat 2,368]

The man above has it.. Buy a crowning tool. I've done a crown with one and without - without using the panhead screw trick. It worked, but it took several tries to get it right despite being very meticulous about it. Without a pilot (which a crowning tool has), if you get even a little bit off-center, the job is ruined and you must start over, which means filing the muzzle flat again. Very frustrating, not worth it, and I'll never do it again.

[jamesavery22 54]

So does it really matter if the barrel or the brass ball (screw) is spinning, both have the same effect.

 

Please don't do the brass screw thing... Swore I've seen a video of Larry Potterfield that was OK. That video is horrible considering what task specific tools are available which achieve much better results with less effort. The tools are more expensive. Also more dummy proof.