Like its exposed-hammer predecessor, the Model 1897, the Winchester Model 12 ... the name was shortened to Model 12 in 1919. Initially only chambered in 20 gauge, 12- and 16-ga.

Winchester’s purpose in developing Long ... But our original test ammunition (12-ga., 3", 1¾-oz., No. 4) boasted a 1/2-oz. heavier shot charge—translating into 35 additional, larger-diameter ...

Meanwhile, ammo manufacturers continued to load steel in the ... That’s quite comparable to the 172 No. 2 pellets found in a Winchester Drylok Super Steel 12-gauge, 3-inch, 1 ³⁄₈-ounce load. The ...