Recessed muzzle crown in a Mod 17-6

500SWArg · #1 09-28-2010, 01:13 PM

Hello, comrades

Has anyone seen this before?

Is a 17-6, 4", circa 1994.

It is normal for this configuration about such recessed crown?

Best regards!

WC145 · #2 09-28-2010, 01:29 PM

Your pic isn't showing up.

500SWArg · #3 09-28-2010, 01:37 PM

Sorry, WC

this is the link: http://s1.postimage.org/cKQtS-65229c0a-resize.jpg

Can you help me?

epj · #4 09-28-2010, 01:49 PM

This is what I call a recessed crown. (627 Pro)

WC145 · #5 09-28-2010, 03:28 PM

I have an early 17-6 6" with the 17-5 "short lug" barrel, it does not have a crown like yours. The muzzle is rounded and the rifling goes all the way to the edge. That probably isn't much help, sorry.

Looking at the photo of your gun I don't see any rifling, how far before the muzzle does it stop?
Here is the picture of your gun for all to see-

500SWArg · #6 09-28-2010, 03:51 PM

Quote:

Originally Posted by WC145

I have an early 17-6 6" with the 17-5 "short lug" barrel, it does not have a crown like yours. The muzzle is rounded and the rifling goes all the way to the edge. That probably isn't much help, sorry.

Looking at the photo of your gun I don't see any rifling, how far before the muzzle does it stop?
Here is the picture of your gun for all to see-

I don't know,.25" may be.
It is not my gun, but the one of a fellow from Argentina.
Look, ST is talking about recessed muzzle crown in 17-9 series:
S&W's New Model 17 Classic
Have you seen something?
The crown of 17-9 is similar to my picture?
Thank you for your participation

500SWArg · #7 09-28-2010, 04:03 PM

Recessed depth is 5/16"
Another pic:

jt1 · #8 09-28-2010, 08:46 PM

I used to have a 617 no dash 8 3/8 that had the recessed crown like yours. They seem to be somewhat of a mystery, not much info on them. Mine was a real nail driver.

John

500SWArg · #9 09-30-2010, 03:06 PM

Thanks, John.
Was it a new weapon?
You think it's a labor of Factory?
What reason is there to do that?
Excuse me for so many questions, in my country nobody knows about this issue.
Best Regards,
Jorge

jt1 · #10 09-30-2010, 10:02 PM

Yes, I purchased it new. It was definitely done by the factory.

The general theory behind a recessed crown is twofold. Since the last bit of rifling that touches the bullet can greatly affect the flight of the bullet, it is desirable to keep this bit of rifling as pristine as possible. The recessed crown protects the rifling from damage. This type of crown is like the pic epj posted above. The second part is that the gas flow around the bullet can affect the bullet flight as it breaks free of the rifling. The deeply recessed crown, like your revolver, smooths the gas flow around the exiting bullet and makes for a more accurate weapon. Normally this type of crown is only seen on target rifles.

I have never seen any info on why Smith choose to use it on some 22 revolvers. That would be interesting to know.

John

500SWArg · #11 10-02-2010, 11:37 AM

Quote:

Originally Posted by jt1

Yes, I purchased it new. It was definitely done by the factory.

The general theory behind a recessed crown is twofold. Since the last bit of rifling that touches the bullet can greatly affect the flight of the bullet, it is desirable to keep this bit of rifling as pristine as possible. The recessed crown protects the rifling from damage. This type of crown is like the pic epj posted above. The second part is that the gas flow around the bullet can affect the bullet flight as it breaks free of the rifling. The deeply recessed crown, like your revolver, smooths the gas flow around the exiting bullet and makes for a more accurate weapon. Normally this type of crown is only seen on target rifles.

I have never seen any info on why Smith choose to use it on some 22 revolvers. That would be interesting to know.

John

The best info!
Thanks, John, and kind regards.

H Richard · #12 10-02-2010, 12:06 PM

I have owned two different 17-6's, and neither one had "recessed" crown's like that one shown. It would almost look like the crown had been damaged and then bored deeper to recess?

500SWArg · #13 10-05-2010, 02:22 PM

repeat message.

500SWArg · #14 10-05-2010, 02:23 PM

Quote:

Originally Posted by H Richard

I have owned two different 17-6's, and neither one had "recessed" crown's like that one shown. It would almost look like the crown had been damaged and then bored deeper to recess?

New gun, right out the box? 'You think?

Gun 4 Fun · #15 10-05-2010, 03:30 PM

I have heard of this being done to help start the cleaning rod/jag/patch down the bore (since revo's have to be cleaned from the muzzle) without ruining the crown of the actual rifling, since the bore of a .22 is rather small and a snug patch can be hard to start, and even then at an angle or against one side more than the other. It's even more important/noticable with smaller bores since improper cleaning habits are magnified.

H Richard · #16 10-06-2010, 10:17 AM

I don't believe this would have been done at the factory.

jt1 · #17 10-06-2010, 08:15 PM

Mine was definitely factory. My FFL ordered it for me when the 617's first came out.

John

islandguy · #18 10-06-2010, 08:54 PM

IMHO, it may have been recessed after S&W QC inspected the muzzle and determined that some minor flaw at the muzzle, possibly a chip or other blemish in the metalwork caused by the rifling broach, needed a bit of "touch-up" work before it left the factory.
Correct me if I'm out in left field on this one guys.

jt1 · #19 10-07-2010, 08:10 PM

Maybe so. I tried to find some info on mine, but was unsuccessful. I posted about it sometime back, and another member had one which was also a 617-0 8 3/8". I thought it might be particular to those guns, but the OP's blows that theory.

John