proper S&W crown

LNBright

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So, I've picked up this project HE2, it has a previously cut cylinder and a shortened barrel, but the muzzle needs a better crown on it.

I went to go take it to the local gunsmith I've previously used, and he's closed up shop. Have stopped into two different larger gunshops in the area trying to seek a new gunsmith recommendation: one said he only knew of a muzzleloader gunsmith, and the other said he 'has a guy, but he's not taking on any more clients', that he has a full-time job and only does gunsmithing on the side. I've tried googling local ones, keep finding more closed shops, or folks that assemble ARs or 'are planning to get a gunsmithing certification', but have yet to find one that I think would 'know' old Smiths.... I am still looking, hoping to find someone. But unless I do, I might have to end up w/ a drawer of tools to properly clean up the muzzle.

When a barrel is cut, the front of the muzzle is flat, perpendicular to the side and bore of the barrel, whereas the original S&W muzzle is rounded in cross-section. Brownells and Midway (albeit currently all on backorder, as is everything) show 90-degree muzzle facing cutters which would ensure the muzzle is trimmed up and even, and they have 45 degree muzzle chamfering tools that would cleaning open up the transition out of the bore to the muzzle. What I've yet to locate is a tool that would accurately return the profile of the muzzle's front face to the rounded nature, instead of leaving it squared off. There must be a name for such a tool of which I'm unaware, or, a guide jig to allow a smith to profile it with a file, or, something. (If I can find the right tool! As of yet, looking for related tools, nothing has even been available.)

Any ideas or suggestions on how to have a proper S&W crown put back onto this revolver's muzzle would be appreciated.
 
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You can use a rounded/radiuses crowning tool to get that shape.
Some are simply a lathe tool bit ground to that shape and the bbl set up in a lathe and then the muzzle cut with that tool to that shape.
Care needs to be taken to center the bore of course or an off center crown results. Though it will look nice, one that is even a couple .ooo off center can effect accuracy.

There are piloted crowning tools that cut the same profile.
They can be used by hand or in a lathe set up.
The correct pilot for your caliber bbl helps keep the crown centered and perpendicular to the bore.

Some chamber reamer rental places offer these. You select the correct pilot size for your bore and in this case you want the radius type crown.
(They also offer square cut, counter bored and all the other styles of a crown')

Here's one example:
Round or Radius Crowning Tool #3, 30-458 caliber - 4D Reamer Rentals

Other Chamber Reamer Rental outfits may offer other options as well...

Since it's a one size fits all radius cutter,,you sometimes need or want to enhance the outside edge radius some more than what the cutter accomplished when using the tool on a small dia bbl.
That's easily accomplished with hand files. You don't need to do anything to the radius that curves inward to the edge of the bore.
..and this is all just cosmetic anyway.

It is possible to do the radiused crown with nothing but hand files and polish up the final look with grit paper.
Large bores are obviously easier to accomplish than small bores, but both are doable. Be extra careful not to jam the point of a file into the bore itself while working.
Hardly anyone does it this way anymore,,the muzzle trim profile tools are what is mostly used today for everyday work.
 
Thank you! Simply knowing I can rent instead of buy is hugely beneficial, but especially w/ pointing me in the right direction of the rounded ones is what I was hoping for.

You're right, as far as pure practicality, an 11-deg would be functional, but, in this case, I was hoping to restore a more traditional-appearing crown to the muzzle.

I appreciate your answer!
 
LNBright since you have your location listed east tn i think you may be close to schulz precision rifles.Great guy,machinist,shooter and gunsmith.I've left handguns with him and always very happy with work done.He has website check it out.
 
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If you use the 90 included/45 per side, cutter with a closely fitting pilot on a rounded crown, you can usually do enough to center the bevel, but not take out too much of the rounded part. Then some cold blue on the newly cut area, and you have to look closely to tell it's not original. A little bit of shooting disguises it even more. You want to clean up at least .030 all the way around. You will be amazed at how far off center some of the rounded crowns are from the factory.
 
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