Just curious; what model Thompson do you have? I just recently acquired the Kahr M1 World War II version; haven't had a chance to shoot it due to THE ANDROMEDA STRAIN ---- oooops, I mean covid19.
Cooper's concept for thumped was significantly more powerful than 45 ACP/Auto-Rim. Cooper’s own definition did not mention a specific cartridge but it was to be big-bore carbine (.44 caliber, or larger) capable of taking 1,000-pound critters at 250 yards.
This idea was supposed brought to life in the wildcat the 45 Professional that became the 450 Bushmaster.
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