Yes
That all depends on what kind of Smith & Wesson it is.
Smith & Wesson Model 29 - .44 Magnum
By the size and features
The Schofield Kid (Jaimz Woolvett) carries a Smith & Wesson Schofield Model 3 throughout the film .
You need to have it examined bya good gunsmith.
wesson. .44 calibur.
You will have to contact S&W
air soft pellets
38 Special and 357 Magnum
You need to have it examined by a gunsmith to be sure.
It is a Smith & Wesson, possibly a model 17 K-22 Masterpiece. They were made from 1947-1993 (in the blued version shown in your photo) and are extremely good target guns.
Dirty Harry used a 44 Magnum in his words "The most powerful handgun in the world." Specifically, it was a Smith and Wesson Model 29 in a .44 magnum. In addition, it is not the most powerful handgun in the world (not even at the time of filming.)