The Cougar Magnum

Harry Callahan

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The Cougar/Couger/Rython Magnum is a particular hybrid revolver, it consist of a Ruger Security-Six frame mated to a Colt Python barrel chambered in .357 magnum, a few gunsmiths in the US used to offer such conversions back in the late 70's till the mid 80's. Along with the more popular Smython or Smolt (S&W M19/66 frame with a Colt Python barrel).

The Colt Python barrel was reputed to be the most accurate production barrel of it’s day because of its higher quality rifling and tighter tolerances. It also tapered to .001 smaller at the muzzle.

The twist rate of 1:14 was more aggressive than both Ruger and Smith & Wesson’s 1:18.75 twist rate. More twist equals more spin and more spin, it was believed, resulted in greater accuracy. Particularly with the 148 grain wadcutters that were generally used In competition.

Moreover, the heaver barrel with full under lug was another advantage providing good forward balance. The Python barrel’s vent rib was claimed to provide a better sighting plane. And, the Python forcing cone was alleged to be stronger and more durable allowing more rounds before accuracy degraded.

So, why the Ruger and Smith & Wesson frames? Because it was, widely known that the Colt Python lock-work and timing did not stand up as well under the heavy use of and high volume of rounds common in PPC competition guns. Ruger’s and Smith’s were accepted as stronger, more durable thus the combination provided the best of both worlds. So, from this the Couger (“Co” from Colt and “uger” from Ruger) Smolt (or Smyton) were born.

Bill Davis, famous for building these guns, was a California Highway Patrol officer and PPC (Police Pistol Combat) national champion. He was also a part-time gunsmith that was doing some work in his garage when he finally decided to leave CHP and start a gunsmith custom shop, Bill’s Gunsmithing Shop, in Sacramento, CA. Later, in 1984, he partnered with his brother forming a small chain of gun shops called Cake-Davis headquartered in Berkley and later Hayward, CA.

The big thing about a Bill Davis conversion was not just the barrel change. It was the action job he would perform. His Smith & Wesson and Ruger action jobs are reputed to have produced the sweetest, buttery smooth, no creep and glass rod break ever.

https://www.gunnuts.net/2010/10/12/the-cougar-magnum/

I used to own a Smolt/Smython and foolishly sold it many years ago, glad to have finally found this one.

This is my new to me Cougar Magnum built by Bill Davis Custom Shop in ~1985:

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Harry,
Superb....
Aesthetically, I much prefer the Ruger than the Smith conversion.
The Ruger seems to blend better with the Python barrell and reminds the lines of the original.
 
Whoa—that is outstanding! I’d heard of the Smolt/Smython but I’d never heard of the Cougar until now. I like the look better than the original Python—I prefer the S&W and Ruger trigger guard shape to the Colt’s—that’s a stunning-looking revolver.
 
How's the lock up at the crane? Looks in the pics like there's a gap?

All Ruger Sixes have some crane gap. It's was designed that way. Here's a couple pics that shows this.

First is a factory 6" Security-Six, next is a couple of Davis builds, a Couger and a Rattler (Speed-Six frame mated to a 3" Colt King Cobra barrel).

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Harry,
Superb....
Aesthetically, I much prefer the Ruger than the Smith conversion.
The Ruger seems to blend better with the Python barrell and reminds the lines of the original.

Thanks Dan, I also find that the Colt Python barrel matches the beefier and design of the SS front frame lines better than when fitted to a K frame.
 
Faster twist more accurate eh? The rimfire guys are having an intervention about this as we speak. I once owned an Anaconda which had an incredible trigger, but I wasn’t a good enough shot to test the accuracy.
 
Whoa—that is outstanding! I’d heard of the Smolt/Smython but I’d never heard of the Cougar until now. I like the look better than the original Python—I prefer the S&W and Ruger trigger guard shape to the Colt’s—that’s a stunning-looking revolver.

Thanks Master-G, can't wait to find out if it shoots as good as it looks!
 
Not yet TC!

Well, I think the right guy actually got that gun, as much as I would like to have it. You know way more about the history and background and obviously have a tremendous appreciation for what you got, and I sure respect that. I knew it was unusual, and I would have appreciated it, and spent time learning about it....but glad you got it Harry. I look forward to your range report. I'm still envious, but in a good way. I think you got a great deal on something special. Cheers!

Edit: I will also agree with Master G about the lines on the trigger guard, it looks just right on the Ruger. Also, I always thought that Ruger nailed it on the cylinder release, I prefer it to the Colt and S&W. It's a better, cleaner, smoother design imo.
 
That is a great looking gun, that short one I really like.
First time I have seen a good picture of the Ruger/ colt set up. While I am not a great fan of stainless , I have had SS python, and Anacondas in 45C, I like the look on the Ruger.. Any Idea what the tread fit may be? I don't know what Ruger used.
 
When Bill Davis graduated to manufacturing the Davis “WindMaster” he took the PPC crowd by storm. Douglas, Shilen & other barrel makers began to make oversize 1” diameter barrel blanks with a faster twist rate than the Colt Python. Dozens of PPC revolver makers sprung up to make these revolvers too. Roy Campbell was one in this area.
S&W actually brought back their model 14-5’s & 14-6’s to address the needs of the hardcore PPC crowd. Then promptly quit production.
 
That is a great looking gun, that short one I really like.
First time I have seen a good picture of the Ruger/ colt set up. While I am not a great fan of stainless , I have had SS python, and Anacondas in 45C, I like the look on the Ruger.. Any Idea what the tread fit may be? I don't know what Ruger used.

TPI of the pre-1991 “two pins” sight Python barrel is .563/32, post 1991 “single pin” sight Python barrel is .562/36 (like the KC & Anaconda). TPI of the Security-Six barrel is .540/24.
 
Had a couple hours to spare yesterday and decided to do a quick range trip with the Cougar.

I was delighted with the performance of the gun. I shot a total of 150 rounds, a box of Federal 158gr. JSP hot .357's @ 1450 FPS and 2 boxes of target load 148gr .38 wadcutters @ 750 FPS.

First started at the 15 yard line with 2x 5 rounds of .38 WC & 1x 5 rounds of .357's to get a feel of the trigger in both DA & SA, sight in the revolver and regulate the sights then moved at the 25 yard line for the accuracy test.

From the 25 yard line:

The .357 158's average for 3x 5 shot group is under 3¼". I shot the last 30 rounds into less than 4" offhand in DA.

The .38 WC target load average for 6x 5 shots is an impressive 2½". I shot 2x 30 rounds into a 3" ragged hole on each target, again offhand in DA.

The DA pull is very smooth, consistent (no stacking at all) and controllable/predictable. I've measured an average of 8.3# for 10 pulls with less than .2# spread. The SA pull is also superb, crisp, break like glass like with 10 pulls average of 2.6# with less than .1# spread. It's probably one of the best DA/SA trigger I've tried, on par or better with any of the S&W's, Colts, Manurhins & the couple Korths I've owned (and sold) in the recent years.

A couple pics of the dirty girl with a well deserved cold one:

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