Gil Sengel’s "Cartridge Board" provided a historical autopsy of this rimmed 9mm variant, explaining why it failed to gain traction despite its technical merits. Propellant and Component Profiles
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The next morning, he drove to his private range. He set up a target at 400 yards—a white paper plate with a red dot. He chambered the first round in his pre-’64 Model 70. The bolt felt tighter than usual.
: Gil Sengel provides a deep dive into the "Short, Unhappy Life" of this unique cartridge in his Cartridge Board column. Modern Load Development