Ruger GP100 Model 1790 357 Magnum

The GP100 is a heavy-duty revolver with a comfortable grip, even when shooting hot magnum loads. With 38 Special loads, recoil is very comfortable. It had the shortest trigger span in double-action mode.


As much as some may think the revolver’s sun has set, we see the platform being reinvented and reconfigured for today’s shooter and everyday carry (EDC). For those who like the simplicity of a double-action wheelgun — at contact distances, they’ve always been durable point-and-shoot choices — we chose three six-shot 357 Magnum revolvers that are newly manufactured and in a reasonable price range of $504 to $894.

The Smith & Wesson Model 66 Combat Magnum comes from an iconic line of Model 66 revolvers. We tested a Model 66-8 variant and found a lot to like about this newest version. There were also a few things we didn’t like. Remember, with a 66-8 you are investing in a pedigree, and there is a cost to access that lineage.

Next, we tested a Ruger GP100 Model 1790, this particular one being a Talo Exclusive, and we think Ruger and Talo did a great job of trying to make a compact revolver out of Ruger’s medium-size GP100 revolver. The Ruger is chunky, but that just means there is more to love, right?

Our third handgun was Rock Island Armory AL3.1 3520S. The Rock Island (RIA) is a relatively new revolver imported from and built in the Czech Republic. We tested a blued AL3.0 a few issues back and gave it a solid A- rating, so here we wanted to handle and shoot a stainless revolver to see how it fared. Could it be a good choice for those wanting to get into a 357 revolver, but who are on a strict budget? Out of the box, we could see it was not as eye appealing as the S&W and Ruger, but we’ll take performance over looks any day.

The common elements of these powerful revolvers are first and foremost the frame size; all are more or less medium-size frames. All have a six-round capacities, 2-inch to 2.75-inch barrels, rubber stocks, double-action/single-action triggers, and plenty of recoil with stiff 357 Magnum loads like the Federal Hydra-Shok self-defense round we used. They also have good accuracy off the bench. The Rock Island has a fixed-groove rear sight, and the Smith & Wesson and Ruger/Talo have adjustable rear sights. The Ruger revolver was more traditional with an all-steel barrel. The S&W and RIA both use more-modern manufacturing approaches with two-piece barrels.

How We Tested

Before actual range testing, we dry-fired these revolvers in double-action trigger mode to accustom ourselves to the trigger pulls. Double-action trigger-pull weights ranged from 11.5 to a very heavy 15 pounds. A heavy trigger-pull weight makes shooting these revolvers more difficult. We thought the Model 66’s trigger was way too heavy, the RIA trigger was okay, and the Ruger trigger was exceptionally smooth and slick. We did not have any issues short-stroking these triggers. These guns were factory new, but we still went through our pre-range testing of the cylinder gap with a feeler gauge and used our range rod match kit ($130; to check barrel and chamber alignment. All the guns were in spec for cylinder gap, the space from the forcing cone to the front of the cylinder. This dimension should be from 0.004 to 0.010 inch.

The RIA and the Ruger both use coil-spring hammer springs, which causes a bit of stacking in double-action trigger mode. We thought the Ruger trigger was exceptionally smooth.

On the range, we tested for accuracy using our range bag as a rest and fired in single-action trigger mode with targets set at 15 yards. We used Thompson Trouble Shooter Target ($6 for five targets from with 4- and 6-inch red and bright yellow bullseyes. These targets have a legend at the bottom that shows bullet holes clustered in different areas around the bullseye — left of bullseye, right of bullseye, top of bullseye, etc. — that provides an explanation of why you are not hitting the center. Could be jerking the trigger, anticipating recoil, etc. We have a few “lazy-finger” shooters who push the trigger slightly to the side, rather than pull straight back. Right-hand shooters with lazy fingers will push hits to the left, and left-hand shooters with this affliction will push shots right of center.

The 357 Magnum revolver is as much practical and versatile as it is effective. These revolvers are compatible with both 38 Special and 357 Magnum cartridges. Starting at the mild end, we ran Armscor 38 Special ammo loaded with a 158-grain FMJ bullet. For 357 Magnum ammo, we used Aguila ammunition loaded with a 158-grain JSP and Federal Premium Hydra-Shoks loaded with a 158-grain JHP bullet. The 158-grain bullet is a sweet spot and original load for the 357 Magnum. This bullet weight is also very common for 38 Special and 38 Special +P loads. We also noted that the 38 Special loads printed higher on the target when using the same aim point as 357 Mag ammo. This is due to bullet speed and muzzle flip.

For speed shooting, we moved to 10 yards and fired at 8-inch paper plates in double-action mode as fast as we could while still being accurate. This exercise pushes you to that point where too much speed with the trigger can cause a miss on the target. We can safely say Jerry Miculek is still the speed king with a wheelgun. If you want to train for speed with a revolver, we suggest using 38 Special cowboy loads or reduced-velocity loads so you can practice technique. Going full speed with Hydra-Shoks, we felt as if we grabbed the tail of a rattlesnake. Not exactly fun, and the more we pushed, the worse it was.

For speedloaders, we used Tuff Products six-round QuickStrip speed loaders ($9.45 for two strips from, which are a flexible urethane material that allows you to load two rounds at a time, and it lays flat in your pocket. These are what we use for EDC. For holsters, we used a nylon Uncle Mike’s Inside the Waistband (IWB) holster and a Galco leather Phoenix belt holster. Here’s what we found:

Gun Tests Grade: A-


Ruger and Talo Distributors teamed up to create this variant of the GP100, which features a 2.5-inch barrel, compact grip, green fiber-optic front sight, and adjustable rear sight. In hand, this GP100 weighs in at 36 ounces unloaded. We noted the double-action trigger pull was exceptionally smooth, and pull weight was 12 pounds, though it felt lighter. We think Ruger did a great job of reducing this GP100 revolver to a size that is more manageable for concealed carry. We do, however, think they could have taken a few additional steps.

Action TypeDA/SA
Overall Length8.0 in.
Barrel Length2.5 in.
Barrel Twist Rate1:18.75 in. RH
Sight Radius3.5 in.
Overall Height5.3 in.
Maximum Width1.5 in.
Weight Unloaded36.0 oz.
Weight Loaded 38.8 oz.
Cylinder Gap 0.007 in.
FrameBlued alloy steel
Barrel/Cylinder Blued alloy steel
Frame Front Strap Height 2.1 in.
Frame Back Strap Height 3.4 in.
GripRubber w/laser checkered wood inserts
Grip Thickness (max)1.2 in.
Grip Circumference (max)5.0 in.
Front SightPost, green fiber optic
Rear SightAdj. notch
Trigger Pull Weight (DA)12.0 lbs.
Trigger Pull Weight (SA)4.1 lbs.
Trigger Span (DA)3.4 in.
Trigger Span (SA)2.6 in.
SafetyInternal transfer bar
WarrantyNone stated
Telephone(336) 949-5200
Made InU.S.A.

While the revolver’s weight is a boon to help reduce felt recoil, it makes toting the revolver a bit more difficult. We would have liked to see a few ounces shaved off by rounding the edges of the frame and barrel. Is that nit picking? Yes it is.

The GP100 is built to last through thousands of rounds of magnum ammo with no cracked forcing cones, stretched frames, or other damage from the pounding. Truth be said, we suspect most shooters will run 38 Special ammo through this gun for training, plinking, or even IDPA competition and load the hottest, most accurate 357 Mag cartridges for self defense. So while over-engineering the revolver is smart for longevity, the user is left with a bulky revolver.

The full-length ejector rods on the blued Ruger and S&W fully ejected empty cases. The Ruger’s crane and frame locked up tightly. The crane-to-frame fit mated up tightly on the S&W.

We like the 2.5-inch barrel because this length provides more velocity and energy. The longer barrel also allows for a longer ejector rod. The full-length ejector rod makes it easier and faster to dump empties from the cylinder. The fit and finish were very good, what we expect from Ruger. The metal finish is deep blue with a contrasting stainless trigger and hammer.

The grip is another good feature of the revolver. It feels a bit chubby and short in hand, and is sized right for concealed carry while still providing excellent recoil reduction when pounding away with magnum ammo. The rubber, while a bit catchy on covering garments, feels full in your hand. The checkered wood inserts give the grip a more traditional look and also provide some texture to the palm of your hand when gripping. Ruger offers larger grips, and there are plenty of aftermarket grips for the GP100 series if you need to swap them out. For EDC, we’d keep the supplied grip.

The HiViz LiteWave green-fiber-optic front sight is another good feature. The bright-green dot is easy to see and fast to pick up. The front sight is dovetailed into the top of the barrel and can be replaced by pushing the front-sight plunger in with a small punch and sliding out the sight. You can also get replacement pipes in white or red. The rear sight is adjustable for windage and elevation. The rear notch has a white outline. In use, the fine white outline gets lost when you focus on the green dot. When we placed the green dot in the notch, these sights worked well. There are also other aftermarket sights available for the GP100, such as the Meprolight Tru-Dot ($135;, which uses a three-dot night-sight setup, if that’s something you prefer.

As we mentioned, there are some edges on the topstrap we would have liked rounded. We do appreciate Ruger tapering the lug for smoother holstering. The cylinder latch on a Ruger is pressed into the recoil shield to open the cylinder. It operated smoothly. There was some very slight cylinder wiggle, but nothing out of the ordinary. The GP100 uses what Ruger calls a triple-locking cylinder that is secured into the frame at the front, rear, and bottom. The front is locked into the frame at the crane via a front latch, and at the rear via the ejector rod. Ruger says the cylinder latch helps lock the cylinder in place for more positive alignment.

We liked the Ruger front sight. The fiber optic was bright on target and is also easily replaced via a plunger located just above the muzzle (arrow).

The trigger was wide and smooth, and the hammer spur was plenty wide and had plenty of toothy checkering for a sure grip when thumbing it back. The firing pin is housed in the frame, and the GP100 uses a transfer-bar safety system. The trigger needs to be fully to the rear to allow the hammer, transfer bar, and firing pin to fire a round.

Going hot, we found the trigger in double-action mode required 12 pounds of finger pressure to fire a round. It felt like a lot less due to the smoothness of the pull. There was little felt stacking. In single-action mode, the trigger broke at 4.1 pounds, which we thought was good for a defense revolver.

In accuracy testing, the best five-shot group measured 2.29 inches with the Aguila 357 Magnum loaded with a 158-grain JSP bullets. The average accuracy was 2.5 to 2.8 inches across all ammo choices, which is fine for self-defense situations. We also noted the Ruger had slightly higher velocities than the Model 66-8, which has a similar barrel length. The AL3.1 has a 2-inch barrel, so we knew its velocities and energies would be less. For speed shooting, we banged at the 8-inch paper plates at 10 yards and found the GP100 was very easy to control. We fired additional strings with magnum ammo and actually thought the felt recoil was very tolerable due to the grip and the weight. The Ruger is the gun you want to shoot if you are doing high-volume training. Empties were easily ejected, with no issues.

The nylon Uncle Mike’s Inside the Pant holster was a good option for carry, but we preferred the Ruger in the Galco Phoenix belt holster due to the carry comfort.

Our Team Said: The Ruger/Talo GP100 is a compromise. It is more comfortable to shoot, but less comfortable to carry. We thought the accuracy was good. We liked the HiViz fiber-optic front sight and the smooth trigger. If you are already a Ruger revolver aficionado, this would make a very good self-defense combat revolver.

38 Special/357 Magnum Range Data

To collect accuracy data, we fired five-shot groups from a bench using a rest. Distance: 15 yards with open sights. We recorded velocities using a ProChrono digital chronograph set 10 feet from the muzzle.
Armscor 38 Special 158-grain Full Metal JacketSmith & Wesson Model 66-8 Ruger/Talo GP100Rock Island Armory AL3.1
Average Velocity 803 fps807 fps799 fps
Muzzle Energy226 ft.-lbs.228 ft.-lbs.224 ft.-lbs.
Smallest Group1.45 in.2.81 in.1.55 in.
Average Group1.81 in.2.85 in.1.97 in.
Aguila 357 Magnum 158-grain Semi-Jacketed Soft PointSmith & Wesson Model 66-8 Ruger/Talo GP100Rock Island Armory AL3.1
Average Velocity 1097 fps1115 fps1000 fps
Muzzle Energy422 ft.-lbs.436 ft.-lbs.351 ft.-lbs.
Smallest Group2.64 in.2.29 in.2.02 in.
Average Group2.75 in.2.63 in.2.65 in.
Federal Hydra-Shok 357 Magnum 158-grain Jacketed Hollow PointSmith & Wesson Model 66-8 Ruger/Talo GP100Rock Island Armory AL3.1
Average Velocity 1112 fps1164 fps999 fps
Muzzle Energy434 ft.-lbs.475 ft.-lbs.350 ft.-lbs.
Smallest Group1.02 in.2.35 in.2.25 in.
Average Group1.83 in.2.49 in.2.60 in.

Value Guide: Shorter Revolver Rankings

Gun NameIssueGradeComments
S&W Model 60 38 Special, $459Dec. 2021B+Stainless-steel construction throughout. We docked it a grade for the very heavy trigger.
Ruger Light Compact Revolver (LCR) 5401 38 Special, $699Dec. 2021BA little lighter, with recoil that goes with that. One of the best revolver triggers we have seen.
Ruger SP101 5737 38 Special, $859Dec. 2021B-Stainless-steel weight mitigates recoil. Too heavy for pocket carry. Okay for home defense.
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. 2021AOur Pick. Offered good accuracy and is ultra-lightweight. The DA trigger was smooth but heavy, with stacking.
Ruger SP101 Model 5784 327 Federal Magnum, $749Aug. 2021AThis offers excellent accuracy and versatility with the ability to fire multiple 32-caliber cartridges.
Charter Arms Professional 73230 32 H&R Magnum, $420Aug. 2021A-Offers 7-shot capacity and can fire a variety of 32-cal. cartridges. Light weight, nice fiber-optic front sight.
Smith & Wesson Model 351 PD 160228 22 WMR, $766Apr. 2021AOur Pick. Offers light weight, 7-shot capacity, and a bright Hi-Viz fiber-optic front sight that we really liked.
Ruger Model LCRx 5439 22 WMR, $599Apr. 2021A-Light weight, great grip, good accuracy. DA trigger pull was very heavy. Would have liked more capacity.
Taurus Model 942 2-942M029 22 WMR, $309Apr. 2021BEight-shot capacity. Heavy, so concealability in a pants pocket is not practical. Trigger pull was heavy.
Smith & Wesson PC Model 986 10227 9mm Luger, $1129Mar. 2021AOur Pick. All-business, made-to-perform revolver. Offered excellent accuracy with Hornady Critical Duty ammo.
Rock Island Armory AL9.0 9231B 9mm Luger, $599Mar. 2021AOffered good accuracy and shooting comfort due to the full-size grip. Aesthetics are not its strong point.
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 King Cobra KCOBRA-SB3BB 357 Magnum, $838May. 2020AOur Pick. A 357 Magnum powerhouse. Offers good performance with the 3-inch barrel and is well made.
Rock Island Armory AL3.0 357 Magnum, $504May. 2020A-Best Buy. Good price, accuracy, shooting comfort. Not a beautiful revolver, but it did provide performance.
Rossi Model 971 VRC 357 Magnum, $295May. 2020BGreat trigger, and the porting helped keep us on target. Accuracy was less than stellar.
Ruger LCRx 5435 22 LR, $470Apr. 2020B+The LCRx is lightweight and would make a nice kit gun if that were the only consideration. Cost is too high.
Smith & Wesson Model 637-2 163050 38 Special +P, $389Dec. 2018AOur Pick. Consistent trigger pull, DA or SA trigger mode, recoil absorbing grip, and lightweight.
Taurus 856 Model 2-856021 38 Special, $278Dec. 2018A-Consistent trigger in double-action or single-action mode, a small grip, and it offers six shots.


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