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Old 12-24-2019, 06:16 PM
RedCardinal RedCardinal is offline
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Here is some BMCM Magic I recieved for Christmas. Bill reamed out the chamber in a new 5906TSW 9MM barrel to 357Sig and had it remarked. It is absolute perfection, and the best custom gunsmith work I have ever had done, including the PC. Now I can shoot both 40S&W and 357Sig in my S&W 4006TSW CHP.


Thank you Bill and Merry Christmas to All.
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BMCM Christmas Magic-4006tsw-chp-357s-barrel-marking-3-jpg   BMCM Christmas Magic-4006tsw-chp-357s-barrel-marking-jpg  

Last edited by RedCardinal; 12-25-2019 at 10:21 PM.
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Old 12-24-2019, 06:34 PM
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Beautiful! The man is a master craftsman! Congrats RedCardinal!

I look forward to your range report. Merry Christmas! Regards 18DAI
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Old 12-24-2019, 06:37 PM
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Glad to hear Red,
Bill gets all my work 3rd gen and a interested up coming project with a 686
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Old 12-24-2019, 10:37 PM
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It looks like great minds think alike . Bill is working his magic on my CS45 like he did on my CS9 and CS10 . I was trying to think of what to do next and Red gave me an idea . I don't have anything else in 357Sig , bot my 4006TSW CHP is just sitting there . I bet that 4006 TSW is a blast shooting 357Sig out of it ! I made up my mind , but Bill is pretty busy now-a-days . Maybe we shouldn't have talked him up so much .
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Old 12-25-2019, 09:43 AM
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Even the re-marking of the barrel is so professionally done. I'd like to know how he did that. And was the barrel re-bored, or was reaming the way to go? Inquiring minds, and all that stuff!
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Old 12-25-2019, 10:50 AM
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Similar to a thread from 3 years ago.

Smith 3913 Chambered in .357 Sig (pics)
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Old 12-25-2019, 05:12 PM
Silver GT Silver GT is offline
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How do you get a hold of Bill?.
(BMCM). I need the Shell Indicator
cut into the top of the Barrel Hood on a
S&W 5906 Barrel.
Silver GT
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Old 12-25-2019, 06:56 PM
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Quote:
Originally Posted by vigil617 View Post
Even the re-marking of the barrel is so professionally done. I'd like to know how he did that. And was the barrel re-bored, or was reaming the way to go? Inquiring minds, and all that stuff!
It's gratifying to see that folks are finally jumping on the 357 Sig conversion bandwagon.

Since I first did mine a few years back, there may have been some upgrades in the technology, but as I have described in these pages:

I started with two 5906TSW barrels to fit the 4006 sized slide and barrel bushing, then using a 357 Sig chamber finish reamer from Dave Manson, I cut the chambers and chamfered the chamber mouths.

I then sent the barrels off to Tony at Precision Welding and had him weld up the "9MM" and "9mm Parabellum" markings on the top of the chambers.

Upon receiving the barrels back from Tony, I smoothed out the welds on the chamber surface, then took the barrels to a local laser engraver that I had used before and had him add the "357 Sig" designations to the chambers.

I also filed a new, straighter angle on the barrel camming lugs on one of the barrels so that I could use it in my non-TSW 40 caliber 3rd gens.

I did go with heavier recoil and main (hammer) springs and do not use the 357 Sig barrels in aluminum framed pistols because of battering issues.

I have since acquired an additional 5906TSW barrel and have left it at 9mm (for now) to use as a 9mm conversion barrel in 40 caliber 3rd gens, but I have plenty of 9mm 3rd gens and rarely use it.

Although the 5906TSW barrel hood is slightly narrower than the 4006TSW barrel hood, I have had no problems or malfunctions shooting them.

As I said, as there may have been some improvements in the ensuing years since since I did mine, I am anxious to hear Bill describe what process he is using now.

Merry Christmas!

John
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Old 12-25-2019, 07:44 PM
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So that is wonderful news. I had asked a few weeks ago about the conversion to 357 Sig for a 4006TSW. I was looking at it backwards though. 9m barrels can be readily had and I have just the "new to me "4006TSW CHP" for this. I will contact BMCM and see what he can do. He must be getting backed up with all the work this forum is giving him. We might burn him out!
I have a Sig P226 and P239 with both barrels. Now its S&Ws turn. I love that cartridge.
The 1st time I was looking at a full blown ballistics comparison chart it stuck out like sore thumb. So while our LEOs are being forced to go to the mellow 9mm at least us enthusiasts can play with the hotter toys!
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Old 12-28-2019, 06:34 AM
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Quote:
Originally Posted by JohnHL View Post
I started with two 5906TSW barrels to fit the 4006 sized slide and barrel bushing, then using a 357 Sig chamber finish reamer from Dave Manson, I cut the chambers and chamfered the chamber mouths.

I also filed a new, straighter angle on the barrel camming lugs on one of the barrels so that I could use it in my non-TSW 40 caliber 3rd gens.

Although the 5906TSW barrel hood is slightly narrower than the 4006TSW barrel hood, I have had no problems or malfunctions shooting them.
I wondered how easy it would be to convert the 4040PD to shoot the 357Sig, being it's on the 9mm frame & already a .40.

I tried my 3914DAO & 3913TSW barrels in the 4040PD.

The dimensions at the chamber (outside) are essentially the same & the hoods are close & don't seem like they'd be a problem, but the difference in diameter of the muzzle was sloppy (about .010" difference). How much difference for yours?

The tip to the 40's barrel is belled while the 9mm's is more hour-glass shaped.

Why did you have to chamfer the chamber mouth?

The camming lugs are different between the -TSW & non-TSWs?

.
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Last edited by BLUEDOT37; 12-31-2019 at 03:02 AM. Reason: .
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Old 12-29-2019, 07:36 PM
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Quote:
Originally Posted by BLUEDOT37 View Post
I wondered how easy it would be to convert the 4040PD to shoot the 357Sig, being it's on the 9mm frame & already a .40.

I tried my 3914DAO & 3913TSW barrels in the 4040PD.

The dimensions at the chamber are essentially the same & the hoods are close & don't seem like they'd be a problem, but the difference in diameter of the muzzle was sloppy (about .010" difference). How much difference for yours?

The tip to the 40's barrel is belled while the 9mm's is more hour-glass shaped.
S&W used two different sized, fixed (pressed in) barrel bushings.
One for the 9mm single and double stack pistols(smaller i.d.) and one for the 40 s&w double stack pistols (larger i.d.).

A third, larger barrel bushing was used on the single stack 40 s&w pistols built on the 45 frame (i.e. the 4013/4 non-TSW models), but we aren't talking about those now.

That is why a 9mm barrel is loose in a 40 s&w slide with a 40 s&w barrel bushing and a 40s&w barrel won't fit in a 9mm slide with a 9mm barrel bushing.

The only exception are the 4" barreled 5903/5906/5943/5946TSW and the 4" barreled 4003/4006/4043/4046TSW models.

Both use the larger i.d. 40 s&w fixed barrel bushing (probably for some commonality in manufacturing).

I believe the hole S&W bores in the muzzle of the slides is the same size and swapping the bushings is easy enough, except S&W won't sell the bushings separately to the public.

If you want to swap bushings in your 4040 with a smaller 9mm bushing from a "donor" slide, then you could rechamber a 3913 barrel to work in your 4040.

Quote:
Why did you have to chamfer the chamber mouth?
Cutting the 9mm chamber to the 40 s&w sized 357 Sig leaves a sharp edge at the chamber mouth.
To avoid stress risers and possibly help with feeding (although bottle necked cartridges don't seem to need much feeding help) I chamfered the chamber mouths.


Quote:
The camming lugs are different between the -TSW & non-TSWs?
Yes.

Again, only on the 9mm and 40s&w TSW models and NOT on the 45 TSW (I guess they felt that the lower pressure 45 didn't need it?).

S&W refers to it as "delayed unlocking".
They steepened the angle of the unlocking lugs on the frame and barrel so that the slide and barrel stay locked together for a slightly longer period of time, letting more gas escape the muzzle before the cartridge ejects.

It was designed to lower "felt recoil".

Sorry for the delay in responding.

Holidays and family stuff.

John

Last edited by JohnHL; 12-29-2019 at 09:48 PM.
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Old 12-30-2019, 10:25 PM
HOUSTON RICK HOUSTON RICK is offline
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Interesting, that would make a 4006 a better investment. However, I know almost nothing about either caliber. Do you still need to change barrels or do both 357 Sig and 40 Caliber work with the same barrel? How difficult to have 9mm as a third option? More inquiring minds. Thank you.
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Old 12-31-2019, 04:34 AM
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Interesting, that would make a 4006 a better investment. However, I know almost nothing about either caliber. Do you still need to change barrels or do both 357 Sig and 40 Caliber work with the same barrel?
Different barrels.

Quote:
How difficult to have 9mm as a third option? More inquiring minds.
Not difficult at all.
If you want 9mm as a third option (as I did), you just get a third barrel.

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Thank you.
You're welcome!

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Old 01-08-2020, 03:22 AM
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Quote:
Originally Posted by RedCardinal View Post
Here is some BMCM Magic I recieved for Christmas. Bill reamed out the chamber in a new 5906TSW 9MM barrel to 357Sig and had it remarked. It is absolute perfection, and the best custom gunsmith work I have ever had done, including the PC. Now I can shoot both 40S&W and 357Sig in my S&W 4006TSW CHP.


Thank you Bill and Merry Christmas to All.
RC, which recoil and hammer springs are you running with the 357 Sig conversion barrel?

John
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Old 01-08-2020, 01:20 PM
RedCardinal RedCardinal is offline
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I have not shot the CHP 4006TSW with the 357S barrel yet. However, I do not plan on changing any recoil or hammer springs. I switch back and fourth on my Sigs without any change and don't think that I would need to change anything on the S&W. If I encounter any problems when shooting the 357S barrel, I will have to seek a solution.
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Old 01-08-2020, 02:13 PM
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I did some fiddling about with a recoil energy calculator...
ShootersCalculator.com | Recoil Calculator

The difference in recoil energy between .40S&W and .357SIG is negligible. Shooting a heavy bullet like a 180gr 40 cal @ 1100fps vs. a 125gr .3566 bullet at 1475...the recoils forces are about the same within a ft.lb. In plugging in a few different combinations, the resulting forces did not change in any meaningful way. I see no need the change springs from other than the factory S&W parts.

Cheers
Bill
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Old 01-08-2020, 05:36 PM
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OK.

Good luck with that.

John
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