Recrowning

[Rigemortis]

I was looking close at the muzzle of my mini. Unloaded of course. It sure looks like it has an uneven chamfer leading into the bore. Now I know I can't expect a lot out of my mini as far as accuracy goes because of the barrel length but could recrowning it help? Does anyone have real experience with this improving their aim?

I have heard of people grinding it with a round brass screw. That seems so crude and inaccurate. Maybe I'm wrong. I saw that Brownells has a 45° cutting tool. But it's 100 bucks. Does naa even crown them when they are made? Mine doesn't look like it. It's probly over board for an inexpensive little hand gun. But I like to tune things up and have things to work on around the house. I'd like all my different guns to work to their fullest potential. It would make it funner to shoot too.

Any thoughts?

Would this tool cut stainless?

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[pietro]

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I would respectfully suggest that what looks to you like an uneven crown is simply the edge of the difference in height between the top of the rifling lands and the bottom of the rifling grooves.







IDK of any quality gun  manufacturer (which NAA is) that doesn't crown the muzzles of their barrels.

BTW, I (for one) have successfully REPAIRED (edit) damaged muzzle crowns via re-crowning with the proper sized round head brass screw and automotive valve grinding compounds (coarse, then fine) using a hand-held household electric drill.

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[Rigemortis]

I don't know if it's even clear in the picture. But I thought I'd try....because... If there isn't a picture, it didn't happen...

And then two other pictures just because I can.

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[Rigemortis]

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I would respectfully suggest that what looks to you like an uneven crown is simply the edge of the difference in height between the top of the rifling lands and the bottom of the rifling grooves.

IDK of any quality gun  manufacturer (which NAA is) that doesn't crown the muzzles of their barrels.

BTW, I (for one) have successfully damaged muzzle crowns via re-crowning with the proper sized round head brass screw and automotive valve grinding compounds (coarse, then fine) using a hand-held household electric drill.

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Good point on the lands and grooves. As well as the part about quality manufacturing. I suppose I should look at it closer with a loop and some proper light.

I'm sorry to hear you had bad luck with the grinding method. I figured I wouldn't go that route and that the right tool is worth the price.

Thank you for replying with your input.

[Canoeal]

I was looking close at the muzzle of my mini. Unloaded of course. It sure looks like it has an uneven chamfer leading into the bore. Now I know I can't expect a lot out of my mini as far as accuracy goes because of the barrel length but could recrowning it help? Does anyone have real experience with this improving their aim?

I have heard of people grinding it with a round brass screw. That seems so crude and inaccurate. Maybe I'm wrong. I saw that Brownells has a 45° cutting tool. But it's 100 bucks. Does naa even crown them when they are made? Mine doesn't look like it. It's probly over board for an inexpensive little hand gun. But I like to tune things up and have things to work on around the house. I'd like all my different guns to work to their fullest potential. It would make it funner to shoot too.

Any thoughts?

Would this tool cut stainless?

It most likely will. Here is a picture I took of the crown on My BW. I have been told that is the correct crown for an NAA.

[Rigemortis]

It most likely will. Here is a picture I took of the crown on My BW. I have been told that is the correct crown for an NAA.

What do you mean by "it most likely will"?

[Canoeal]

I haven't seen any usage tests for them , but why wouldn't they?

[bill_deshivs]

Barrel length has nothing to do with inherent accuracy.
The muzzle on your gun looks ok in your bad pictures.

[Uncle_Lee]

Hey those are very good pictures.
Thanks for sharing.

[pietro]

BTW, I (for one) have successfully damaged muzzle crowns via re-crowning with the proper sized round head brass screw and automotive valve grinding compounds (coarse, then fine) using a hand-held household electric drill.

I'm sorry to hear you had bad luck with the grinding method.

I figured I wouldn't go that route and that the right tool is worth the price.

Thank you for replying with your input.

You're welcome..... 

Errrrr......... I had a senior moment, and neglected to used the word "repaired" between the words "successfully" and "damaged" in my original statement... 

Thanks for bringing my faux pas to my attention.



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[OV-1D]

I read somewhere you can do a light crowning by using a brass 1/4 inch round headed (philips type) and some lighter grit sandpaper (wrapping the sandpaper over the tip of screw) and a common drill motor. Smoothing out the rifling at the tip of the barrel helps out very ,very well to help prevent tumbling . Can polish it the same way with jewelers powder or graphite grease or Vaseline with the powder . Nothing feels better doing your own improvements and patting yourself on the back ,ha ,ha  .

[zburkett]

NAAs are very accurate for small pistols.  It is the sights and holding that small a gun steady that is the problem.  You will probably improve accuracy more by painting your front sight with bright orange model paint than you will from recrowning the barrel.