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Winchester's WSL Cartridges
32 WSL, 35 WSL, 351WSL, 401 WSL
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The Winchester Company introduced the first WSL (Winchester Self-Loading) cartridge in
1905 for the Winchester Model 1905 SL rifle. SL= Self-loading or Semi-Auto.
The first cartridge was the 35 WSL (.35" diameter projectile) and the second was the .32
WSL (.32" diameter projectile) in 1906 for small to mid-size game.
The 32WSL cartridge was the prototype for the famous U.S. Military  30 Carbine cartridge.
Both the 32WSL & 35WSL were  under-powered for big game and the Winchester Model
1905 SL rifle was discontinued in 1920; however, the cartridges were produced until
app. mid-1950s ?
The Winchester Company introduced the 351 WSL in 1907 for the Model 1907 SL rifle,
Please note, again: SL = Self-Loading or Semi-Auto.
The 351WSL was more powerful then the 35 WSL, but still not suitible for deer-sized game,
and the rifle was discontinued in 1920; however, as with the other WSL cartridges, the 351
was produced until app. mid-1950s.
The Winchester Company introduced the 401 WSL in 1910 for the Model 1910 SL rifle,
Please note, again:  SL = Self-Loading or Semi-Auto.
The 401WSL was more powerful than the 351 WSL and suitable for deer hunting;
however, the rifle was discontinued in 1936, and the 401 WSL cartridges, was produced until app.
early 1950s.