The Rossi RM66 in .357 Magnum is a 6-shot DA/SA revolver with a 6-inch barrel and matte black finish over a stainless steel frame. Weighing 2.2 lbs, it handles both .357 Magnum and .38 Special loads from the same cylinder. 
 

Key Specifications 

• Action: Double/Single Action (DA/SA) 
• Caliber: .357 Magnum / .38 Special 
• Barrel Length: 6 inches 
• Capacity: 6 rounds 
• Finish: Matte Black 
• Frame Material: Stainless Steel 
• Weight: 2.2 lbs 
   

Detailed Features 

The DA/SA mechanism gives you a lighter single-action pull for deliberate aimed shots and a heavier double-action pull for faster cycling. A serrated front sight pairs with an adjustable rear — the adjustable rear is useful for dialing in different .357 and .38 Special loads since they hit at different points of aim. The black textured rubber grips help absorb .357 Magnum recoil. A transfer bar safety prevents unintended discharge while keeping the trigger accessible when needed.

The Rossi RM66 in matte black draws mostly positive feedback from revolver buyers who want a capable .357/.38 Special platform at a price below domestic alternatives.

Build quality and feel are consistently mentioned as positives: the matte black finish looks clean, the rubber grip handles full-power .357 loads reasonably well, and the frame feels solid in hand. The DA/SA action in particular gets good marks from owners who appreciate the single-action option for deliberate shooting.

The .357/.38 versatility comes up often as a practical benefit, since it lets shooters train on affordable .38 Special and step up to .357 Magnum when needed.

On the critical side: cylinder timing and alignment issues show up in owner reports sporadically, which is a quality-consistency concern. Size and weight draw some comments from those who expected something more packable. Aftermarket accessory availability is more limited than for Ruger or S&W revolvers.