S&W 686 .357 Combat Magnum

The S&W 686 is a stainless steel revolver chambered in .357 Magnum and available in a number of variants including 6 and 7 shot versions and barrel lengths from 2.5 inch snubby to an 8.5 inch beast.

A good balance between muzzle velocity, accuracy and speed is the 6 inch version as shown here:

Product specs can be found on the 686 page on the S&W website

If you want to see how fast someone can shoot a S&W revolver check out Jerry Miculek shooting 12 rounds in 3 seconds including a reload.