Ruger GP100 No. 1707 357 Magnum

The GP100 proved reliable, accurate, and smooth handling. While there are things on the gun we would have improved — the grips were a bit angular — its performance cannot be faulted. It is the Best Buy of the four revolvers tested, and we heartily recommend it.


Why test revolvers? They will never be as popular as they once were, but total sales are far higher than when revolvers were in their heyday in the 1970s. Reliability and accuracy are hallmarks of the revolver, and there is no more proven cartridge for personal defense than the 357 Magnum. The revolvers tested are versatile, durable, accurate, and powerful. We pitted a new Colt Python against similar long-barrel competitors, the Smith & Wesson 686 Plus and Ruger GP100. Also, to see how far the wheelgun’s development has gone in the last couple of decades, we threw in a classic Colt revolver, the Peacekeeper.

In the end, the gap in price between the Ruger, top, and the Colt Python, bottom, was just too great be-cause the GP100 provided such good performance.

Long-barrel revolvers are useful for hunting small to medium game, for competition, target shooting, protection against wild animals, and home defense. In a day when new technology is rendered obsolete quickly, revolvers rely on proven technology that has changed little in dozens of years. As far as chambering, the 357 Magnum is a versatile cartridge, and, of course, 38 Special ammunition may also be used in these wheelguns for pleasant practice and smaller game. If you handload, the 357 cartridge is economical. Fast-stepping 110- to 140-grain defense loads are well suited to stopping an attack, while 160- to 180-grain loads are useful for hunting. There is no difficulty in operating the revolver with light loads or heavy loads because the revolver is manually operated, although it may be run quickly, if needed. Revolvers are so reliable that the standard malfunction drill for them (in case of a bad round) is to simply pull the trigger again to get access to a fresh cartridge. Ammunition is presently difficult to come by in some calibers, but 38 Special and 357 loads have not been hit as hard. However, high-quality pistols are in short supply, but revolvers seem less affected. Some of the wheelguns tested, the Python in particular, may represent a kind of financial irresponsibility because they are quite pricey, but then its performance is excellent.

The revolvers were accurate with a range of ammunition in 125-, 148-, and 158-grain weights.

Because we are interested in accuracy in the combat sense as well as bench accuracy, we chose ammunition carefully. Ammunition has a tremendous influence on accuracy. SAAMI-regulated ammunition ensures compatibility, performance, and accuracy. For combat shooting, we chose the Black Hills Ammunition 158-grain lead load, a cowboy-action load at an average of 805 fps. It is loaded in the Magnum case but operates at 38 Special pressure. We also used the Federal Train and Protect 125-grain JHP at 1470 to 1520 fps and the 1280-fps Hornady 158-grain XTP. We also used a single 38 Special load, the Black Hills Ammunition 148-grain wadcutter. This 38 Special load averaged 750 fps in velocity.

Prior to testing, we checked the barrel cylinder gap of each revolver. The Python was tightest at 0.006 inch, and the Smith & Wesson was almost undetectably larger. The Ruger was 0.007 inch, and the older Colt measured 0.008 inch. We have tested revolvers with a barrel-cylinder gap as large as 0.016 inch, and usually, velocity is linear to the barrel-cylinder gap. A 125-grain load may lose 180 fps as a result of a larger gap, a 158-grain load may lose 160 fps. As it turned out, the revolvers were fairly uniform in velocity.

We liked all of the revolvers, but there was one obvious Best Buy, which we will get to presently.

Gun Tests Grade: A (BEST BUY)


The Ruger’s heavy underlugged barrel helps control recoil. The Ruger’s front sight is dovetailed in place.

We purchased this revolver a year ago in anticipation of accumulating four revolvers for testing. A recent look at new Ruger GP100 revolvers shows their prices have inched up to about $775 average retail. But some are seven-shot revolvers, which command a premium. The six-shot 6-inch-barrel GP100 is a stainless-steel revolver with a lock up on the crane, like the Smith & Wesson revolver. The Ruger doesn’t have an action lock.

Action TypeDouble-action revolver
Overall Length11.5 in.
Overall Height 5.5 in.
Minimum Width1.55 in.
Weight Unloaded42.0 oz.
Weight Loaded44.0 oz.
Barrel6.0 in., stainless steel
Cylinder Capacity6
FrameStainless steel
Front Strap Height2.5 in.
Rear Strap Height 4.5 in.
Grips Rubber
Grip Thickness1.2 in.
Grip Circumference4.8 in.
Front SightDovetail post
Rear SightAdjustable
Sight Radius7.5 in.
Trigger Pull Weight Single Action4.0 lbs.
Trigger Pull Weight Double Action13.6 lbs.
Trigger Span Single Action3.5 in.
Trigger Span Double Action3.8 in.
Warranty None written
Telephone(336) 949-5200
Made in USA
The Ruger GP100’s rear sight is likewise adjustable for windage and elevation and looks crisp.

The rear sights are rugged, and the front post may be changed from its dovetail. When it comes to beefing up the revolver’s frame and improving the sights, we feel that Colt probably took a hard look at the GP100 when redesigning the new Python. The heavy underlugged barrel makes for good balance. The grips are hand filling and absorb recoil well, but were too square and angular compared to the other grips, in our team’s estimation.

The Ruger GP100 is a heavy-frame revolver with a good reputation for strength. It features a lockup on the crane (arrow).

The double-action trigger press is heavier than the other revolvers. While smooth enough, it isn’t as smooth as the more expensive revolvers. On the combat course, we had the impression we were not firing as quickly as with the other revolvers, but combat accuracy was good. As one of the raters stated, “Put the front sight on the target, and it simply hangs there in recoil.” Photos shows there is muzzle flip, of course, but it is modest. In bench accuracy, the GP100 was more accurate than the Python with one load.

Our Team Said: The Ruger GP100 is a credible choice and is our Best Buy.

357 Magnum and 38 Special Range Data (25 Yards)

All groups were fired from a Bullshooters gun rest from a benchrest firing position. The groups were fired in strings of three five-shot groups for each load in each handgun. Velocity was tested by firing over a RCBS Ammomaster Chrono-graph.
357 Magnum Hornady 158-grain XTP 90562Colt PeacekeeperSmith & Wesson Model 686 PlusRuger GP100Colt Python
Average Velocity1239 fps1280 fps1267 fps1275 fps
Energy539 ft.-lbs.575 ft.-lbs.563 ft.-lbs.570 ft.-lbs.
Small Group2.3 in.1.65 in.1.6 in.1.8 in.
Average Group2.8 in.2.0 in.2.1 in2.2 in.
357 Magnum Federal 125-grain JHPColt PeacekeeperSmith & Wesson Model 686 PlusRuger GP100Colt Python
Average Velocity1472 fps1455 fps1490 fps1502 fps
Energy601 ft.-lbs.588 ft.-lbs.616 ft.-lbs.626 ft.-lbs.
Small Group2.5 in.1.8 in.2.0 in.1.5 in.
Average Group3.0 in.2.4 in.2.7 in.1.8 in.
38 Special Black Hills 148-grain Wadcutter Colt PeacekeeperSmith & Wesson Model 686 PlusRuger GP100Colt Python
Average Velocity770 fps739 fps756 fps750 fps
Energy195 ft.-lbs.179 ft.-lbs.188 ft.-lbs.185 ft.-lbs.
Small Group2.5 in.1.76 in.2.1 in.1.5 in.
Average Group3.3 in.2.3 in.2.5 in.1.8 in.

Value Guide: 38 Special/357 Magnum Revolver Rankings

Gun NameIssueGradeComments
Taurus Tracker 692 38 Sp./ 357 Mag./9mm Luger, $487Oct. 2021AOur Pick. Excellent versatility. Other revolvers do not have this versatility or offer seven shots.
Taurus Defender 856 2-85639NS 38 Sp. +P, $306Oct. 2021A-Best Buy. Offers six-shot capacity, a 3-inch heavy barrel, and a tritium-insert front-sight.
EAA Weihrauch Windicator 741566103612 357 Mag., $394Oct. 2021ANeed a house gun or truck gun to be fired occasionally, but which must always come up shooting? This is it.
Rock Island Armory M206 51283 38 Sp., $240Oct. 2021BWe disliked the too-long hammer spur, and the wooden concealment grips are not well designed.
Taurus 856 Defender Ultra-Lite 2-85639ULNS 38 Sp. +P, $405Aug. 2021AOffered good accuracy and is ultra-lightweight. The DA trigger pull was smooth but heavy, with a bit of stacking.
Taurus Tracker 692 2-692039 9mm/38 Sp./357 Mag., $705Mar. 2021A-Offers a lot of versatility with the extra cylinder assembly. The price is reasonable.
Colt Python (2020) PYTHON-SP4WTS 357 Magnum, $1300Jan. 2021APricey, but the new Python is a winner, even if it isn’t an exact clone of the original Python.
Colt Python (2020) PYTHON-SP6WTS 357 Magnum, $1800Jan. 2021AWe really liked the trigger and found the revolver to be quite accurate.
Colt Python (1980) 357 Magnum, ~$2500Jan. 2021AThe trigger is superb and the royal blue finish is brilliant. The aftermarket Hogue grip helps reduce felt recoil.
Colt Python (1964) 357 Magnum, $1800Jan. 2021A-It provided good performance and accuracy. This is a shooter and perhaps is a candidate for restoration.
Colt King Cobra KCOBRA-SB3BB 357 Magnum, $8382020-05-01 00:00:00AThe revolver offers good performance with the 3-inch barrel and is well made. Carrying it takes a bit of effort.
Rock Island Armory AL3.0 357 Magnum, $5042020-05-01 00:00:00A-There was a lot to like, price, accuracy, shooting comfort. Not a beautiful revolver for sure.
Rossi Model 971 VRC 357 Magnum, $2952020-05-01 00:00:00BA great trigger, and the porting helped keep us on target. But the accuracy was less than stellar.
Taurus Model 66 2-660041 357 Magnum, $371Oct. 2019AWell suited to personal defense and home defense. Good field gun for protection against animals.
Taurus 608 Matte Stainless 2-608049 357 Magnum, $548Oct. 2019A-It is a big gun. Just the same, the size and eight-shot capacity made it ideal for home defense.
Smith & Wesson M27 Classic 150339 357 Magnum, $909Oct. 2019B-The grips are not the best design for handling magnum loads. Trigger action was the big problem, very heavy.
Ruger GP100 KGP-141357 Magnum, $500Sep. 2018AThe stainless-steel GP100 performs in all categories: accuracy, smoothness, control, and velocity.
S&W M66 Combat Magnum 357 Magnum, , $420Sep. 2018B+Stainless steel, smooth action, and a round-butt configuration seldom seen on the Combat Magnum.
Ruger GP100 GP-141 357 Magnum, $480Sep. 2018B+The blued GP100 doesn’t perform on par with the stainless, and the stainless is easier to maintain.
S&W M19 Combat Magnum 357 Magnum, $800Sep. 2018BCame with a display case and a knife with matching serial number — pretty neat, but also pricey.
Taurus Model 66 357 Magnum, $325Sep. 2018B-The barrel length of 6 inches did not generate greater velocity. Current-production version is 2-660069.


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