I used some Remington Match 185 gr FMJ in .452". If I seated them at 1.275", they will not chamber in any of my 45s.
The barrel took a trip to the lathe with a 29/64" drill increased the freebore untill the 1.275" OAL round fit.
But I do see what you mean. Midway's chamber must have been throated very long.
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