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#3463091 - 11/08/09 05:16 PM Is it possible to convert a Ruger .38 Service6 to a .357 Security6?
StubbleDuck Offline
Campfire Guide

Registered: 11/18/06
Posts: 4531
Hello folks.

Was at the gun show yesterday hoping to find a Ruger Security Six, but all I found was one fixed-sight [police] Service Six in .38 special. Was pretty clean in good shape, but in the .38 and not the .357. Fellow was asking $365.

My question, can a .38 special Service Six be converted to a .357 mag? YES, they have the same bore size, and I realize a ton of details and other questions come with that one too, but what I really need to ask/know .....

Are the frames the same size on the Service Six? Speed Six? Security Six?

If the answer is "No," no sense in trying to proceed any further.

But if the frame sizes are correct. "possibilities" then become available.

I realize several things would have to be addressed besides just swapping out a .38 cylinder for a .357 cylinder.

Do all the Ruger "security" revolvers have the same frame size?

Anyone reading this thread, who is intimately familiar with the old[er] Ruger "Security" revolvers, could a [police] Service Six be converted to a Security Six? Thank you!

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#3463420 - 11/08/09 06:47 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: StubbleDuck]
P_Weed Offline
Campfire Tracker

Registered: 06/24/05
Posts: 6843
Loc: Dakota Territory
I believe that it IS 'possible' to do this conversion.

The Security Six and all of it's 'variants' were built on the same robust medium-size frame with heavy duty parts.

The Service Six & Police Service Six were introduced to cash in on the Law Enforcement market.

Like the Security Six, the Service Six was mostly chambered in .357 Magnum. But since many Police Departments required .38 Spl. ammunition only ... Ruger also chambered Service Six revolvers in .38 Spl.

I don't know what re-chambering would cost you $$$ ? ... but a Service Six .38 Spl. in 'nice' AND ORIGINAL condition would be a very desirable aquisition. These 'old' Ruger Security Six type revolvers are becoming much popular in demand and will only increase in value.

I'd leave this one alone AS IS ... and maybe eventually buy another Ruger SS chambered for the .357 Mag.


Edited by P_Weed (11/08/09 06:57 PM)
Edit Reason: AND ORIGINAL

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#3463466 - 11/08/09 07:05 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: P_Weed]
RufusG Online   content
Campfire Guide

Registered: 12/16/03
Posts: 4765
Loc: In the weeds, AZ
I don't know what prices are where you live but I think at $365 you may already be upside down on that gun before you start grinding on it.

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#3463611 - 11/08/09 08:04 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: RufusG]
StubbleDuck Offline
Campfire Guide

Registered: 11/18/06
Posts: 4531
Originally Posted By: RufusG
I don't know what prices are where you live but I think at $365 you may already be upside down on that gun before you start grinding on it.


Interesting how you used the word "grinding" in your answer. smirk

I didn't get that piece, altho I'm sure I could get the dealer to knock off some $$$ since he's been holding it quite awhile.

As for the family of Security/Service Sixes being built on the same robust medium frame, that sounds encouraging! I'll keep looking.

Thanks fellas. grin

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#3463622 - 11/08/09 08:09 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: StubbleDuck]
RufusG Online   content
Campfire Guide

Registered: 12/16/03
Posts: 4765
Loc: In the weeds, AZ
Originally Posted By: StubbleDuck
Originally Posted By: RufusG
I don't know what prices are where you live but I think at $365 you may already be upside down on that gun before you start grinding on it.


Interesting how you used the word "grinding" in your answer. smirk


Now that you mention it "reaming" is probably more appropriate. smile

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#3463842 - 11/08/09 10:15 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: RufusG]
StubbleDuck Offline
Campfire Guide

Registered: 11/18/06
Posts: 4531
No worries!

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#3464807 - 11/09/09 10:35 AM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: P_Weed]
T LEE Offline
Campfire Oracle

Registered: 02/20/01
Posts: 66985
Loc: Punta Gorda, FL
You will need a .357 cylinder, different heat treating used on the .38.
_________________________


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#3465049 - 11/09/09 12:20 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: T LEE]
StubbleDuck Offline
Campfire Guide

Registered: 11/18/06
Posts: 4531
Thanks TLee.

But is it "mostly" that simple?

Or does one also have to worry about cylinder timing?

Fit of the forcing cone to the cylinder face?

etc., etc., etc. ??


Is the metallurgy and specs of a .38 barrel the same as a .357 barrel? Thanks again.

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#3465612 - 11/09/09 03:58 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: StubbleDuck]
SteveS Offline
Campfire Regular

Registered: 02/03/09
Posts: 323
Loc: NH
Yes, you'd have to worry about timing, and I don't think Ruger would do it for you, which means you'd have to pay a smith. Then you'd be way upside down. I'd wait for a 357 to come along--there's usually one or two at most shows. Around here you could get a stainless Sec. Six in great shape for $375--a little more if you want 6" or with an original box and you'd have adj. sights, but the square butt like the Serv. Six.

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#3465884 - 11/09/09 05:20 PM Re: Is it possible to convert a Ruger .38 Service6 to a .357 Security6? [Re: SteveS]
P_Weed Offline
Campfire Tracker

Registered: 06/24/05
Posts: 6843
Loc: Dakota Territory
Actually, the .38 SPL. barrel DOES have a 'faster' rifling twist to it - than does the barrel for the more powerful .357 Mag.

But I wouldn't worry about it, IF you convert the .38 to a .357, all that will happen is ... you will BUZZ up them .357's.

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