Gunsmithing Which kind of crown do you like and why?

[carbonbased]

Hey everyone. First off, it appears the crown style has no effect on a rifle’s accuracy. But I thought it would be fun to see what kind of crown you guys like (and why).

My Kidd has a counterbored crown. Not sure if centerfires have this style?

Our own @Frank Green has an enlightening list over on accurate shooter:

https://forum.accurateshooter.com/threads/whats-your-favorite-target-crown-on-your-ppc-or-br-and-why.4110957/post-38811110

He does mention one advantage to the 11° is you can see the gas venting lines, which is a shortcut way of seeing if your crown is messed up. This trick surely(?) doesn’t work when using a suppressor. (Edit: wrong!)

He also approves of breaking the crown’s edge at 60° vs. leaving it sharp.

Recessed crowns of any type can help avoid crown damage.

Anyway, have fun!

 

[roostercogburn98]

Ahhhhhhh we are not talking about headwear, seems I was excited to read some of the stories from the “kangs” here


That being said, I really like the looks of a deep recessed style crown and a close second to standard. The 11 degree is kinda intriguing as well, but not as appealing to the eye

 

[Frank Green]

Hey everyone. First off, it appears the crown style has no effect on a rifle’s accuracy. But I thought it would be fun to see what kind of crown you guys like (and why).

View attachment 8690572
View attachment 8690577

My Kidd has a counterbored crown. Not sure if centerfires have this style?

Our own @Frank Green has an enlightening list over on accurate shooter:

https://forum.accurateshooter.com/threads/whats-your-favorite-target-crown-on-your-ppc-or-br-and-why.4110957/post-38811110

He does mention one advantage to the 11° is you can see the gas venting lines, which is a shortcut way of seeing if your crown is messed up. This trick surely(?) doesn’t work when using a suppressor.
View attachment 8690575

He also approves of breaking the crown’s edge at 60° vs. leaving it sharp.

Recessed crowns of any type can help avoid crown damage.

Anyway, have fun!

The problem with that really deep counterbore crowned that you show. Is how do you make sure you break the edge of the bore without leaving a burr? If you leave a burr the first bullet or so down the bore will break the edge away and leave a jagged edge at the bore and accuracy typically sucks.

Every barrel we've seen/sent back to us with a deep counterbore like that... the edge of the crown at the bore is horrible looking.

After you do one like that... better double check the finish at the bore edge before shooting it.

Later, Frank

 

[lash]

Is this a good place to ask how to clean up a crown that’s been damaged by too much suppressor use and carbon build up?

Without having to take it to a smith?

Or is that a pipe dream? Pun intended.

 

[spife7980]

He does mention one advantage to the 11° is you can see the gas venting lines, which is a shortcut way of seeing if your crown is messed up. This trick surely(?) doesn’t work when using a suppressor.

It can, just has to be clean enough. Doesn’t work on anything once it’s all covered up solid.

 

[carbonbased]

The problem with that really deep counterbore crowned that you show. Is how do you make sure you break the edge of the bore without leaving a burr? If you leave a burr the first bullet or so down the bore will break the edge away and leave a jagged edge at the bore and accuracy typically sucks.

Every barrel we've seen/sent back to us with a deep counterbore like that... the edge of the crown at the bore is horrible looking.

After you do one like that... better double check the finish at the bore edge before shooting it.

Later, Frank

Interesting! I see the problem. My Kidd threaded barrels came from the factory that way; Kidd didn’t ask me how to thread them. Hmmmm. I need to check the finish on their crowns. Thanks Frank!

 

[carbonbased]

It can, just has to be clean enough. Doesn’t work on anything once it’s all covered up solid.
View attachment 8690678
View attachment 8690679

So, the first pic is of the front of the suppressor, and the second is the front of the muzzle (after can removal)?

I kinda wondered if just a few shots after a good cleaning would give me the results you posted. Cool that it does! Thanks man.

 

[carbonbased]

Is this a good place to ask how to clean up a crown that’s been damaged by too much suppressor use and carbon build up?

Without having to take it to a smith?

Or is that a pipe dream? Pun intended.

Yeah, I’ve wondered if using hand tools is a (good) option. Crown specific tools, of course.

 

[Mulepackhunter]

Hand crowning tools can be used but your at the mercy of the operators finesse and feel for bushing fit and the cutting itself. It does work but indicated on the lathe is always the best.
The set back crown is always good just to protect it from damage. I usually do counterbore (not crazy deep) or 11 degree

 

[spife7980]

So, the first pic is of the front of the suppressor, and the second is the front of the muzzle (after can removal)?

I kinda wondered if just a few shots after a good cleaning would give me the results you posted. Cool that it does! Thanks man.

First pic is with just the universal 419 mount, second pic is of the universal 419 with the thread protector on it. Different rifles, different times. All are dirty after the first 30 rounds.

 

[carbonbased]

First pic is with just the universal 419 mount, second pic is of the universal 419 with the thread protector on it. Different rifles, different times. All are dirty after the first 30 rounds.

Ok, that’s making sense now. To save other people time:

The silver bit with the gas lines is the 11° crown, and the first pic has just this thing threaded around it:

(The way the pic looks makes this universal adapter sorta blend in with the crown/barrel)

And the second pic has this thread protecter threaded over the universal adapter (making it look like a deep recessed crown, but it’s still an 11°).

Doesn’t matter if it’s the Hellfire or Sidewinder system.

Anyway, thanks for the explanation. I was scratching my head, for sure lol

 

[chevy_man]

Doesn't matter as long as it was cut correctly.

 

[Rubicon Precision]

With muzzle threads, 11* with a 60* included angle break at the rifling.
No threads. Whatever style the customer wants.