Those Mysterious Forty-fives

[Dwight Gruber]

Originally Posted by postino

Or, to put it in real world values, about 10 sheets of lined notebook paper...

That is still enough to prevent a M1906 cartridge from chambering in a .45 ACP chamber; or to prevent a .45 ACP round from being reliably fired from an M1906 chamber...(One doesn't go in far enough, the other goes too far in)...

Purely hypothetical, unless you have a time machine...<looks at door to see if Postino has returned from the future>...

It would be very practical to fire a .45 ACP cartridge in a barrel chambered for the 1906 .45 cartridge. Consider the Astra 400, chambered in 9mm Largo. It is claimed that a cartridge as short as a 9mm Parabellum can be shot in this pistol, and and I have done so. The pistol functioned reliably, although the empty casings were extremely dirty from the powder blowing back into the chamber from the excessive headspace. The headspace difference between the 9mm Largo and the 9mm Parabellum is orders of magnitude more than the difference between the .45 ACP and the 1906 .45.

--Dwight