Description
There is something satisfying about a full-size .357 wheelgun that just does its job, and the Rossi RM66 fits that bill without emptying your wallet. This medium-frame revolver runs six rounds of .357 Magnum or .38 Special through a 6-inch barrel with a full underlug, and that extra steel up front does real work taming muzzle flip when you feed it stout magnum loads. At 34.4 ounces, it carries enough heft to stay planted through a full cylinder without feeling like an anchor on the hip.
A Trigger Worth Talking About on the RM66
Rossi built its reputation on revolver triggers, and this one lives up to it. The double action pull rolls through smooth and consistent, while the single action break is crisp enough to make slow-fire target work genuinely enjoyable. Pair that with a removable serrated blade front sight and a fully adjustable rear, and you can dial your zero to whatever load you shoot most, whether that is 158 grain magnums or soft-recoiling 130 grain .38s for a relaxed afternoon of plinking.
Built to Run, Easy to Live With
The frame and cylinder are stainless steel dressed in a black finish, so you get corrosion resistance underneath a look that hides wear well. A wrap-around textured rubber grip cushions your hand against magnum recoil and gives smaller and larger hands alike something solid to hold onto. The exposed hammer and hammer block safety keep the operation traditional and simple. Since the RM66 shares its footprint with other popular medium-frame revolvers, finding holsters, speed loaders, and aftermarket grips is refreshingly easy.
This is the kind of revolver that earns its keep as a do-it-all wheelgun: steady enough for paper punching at 25 yards, potent enough for the trail, and simple enough that it will still be running long after fancier guns need attention. Load it light or load it hot, the RM66 handles both without complaint.
Key Specifications
- Model: RM66
- Manufacturer Part Number: 2-RM661
- UPC: 725327939917
- Caliber: .357 Magnum / .38 Special +P
- Capacity: 6 rounds
- Action: Double Action / Single Action
- Barrel Length: 6 inches
- Frame: Medium frame, stainless steel
- Finish: Black
- Grips: Black textured wrap-around rubber
- Sights: Removable serrated blade front, fully adjustable rear
- Overall Length: 11.14 inches
- Weight: 34.4 oz (unloaded)
- Safety: Hammer block
- Hammer: Exposed
What’s Included
- Rossi RM66 .357 Magnum revolver
- Manufacturer's box
- Owner's manual
Frequently Asked Questions
Can the Rossi RM66 shoot .38 Special as well as .357 Magnum?
Yes. Like any revolver chambered in .357 Magnum, the RM66 runs .38 Special and .38 Special +P without any modification. A lot of owners do most of their range work with affordable .38s and save the magnums for when it counts, which keeps practice cheap and recoil mild.
Does the 6-inch barrel make the RM66 hard to handle?
Not at all. The full underlug barrel adds weight right where you want it, out front, which steadies your sight picture and noticeably softens muzzle flip with magnum loads. Combined with the 34.4 ounce overall weight and cushioned rubber grip, it is one of the more comfortable ways to shoot full-power .357.
Will holsters and speed loaders for other medium-frame revolvers fit the RM66?
In most cases, yes. The RM66 shares its dimensions with the Taurus 66 and other similar medium-frame six-shooters, so common holsters, speed loaders, and even aftermarket grips designed for those platforms generally fit. That gives you a wide accessory pool right out of the gate.
Are the sights on the Rossi RM66 adjustable?
Yes. The rear sight is fully adjustable for windage and elevation, and the front is a removable serrated blade. That means you can zero the gun for your preferred load, whether that is a heavy 158 grain magnum or a light .38 Special target round, and hold dead-on instead of guessing.




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