All rough calculations:
At 35,000 psi SAMMI max the total load on the chamber walls of a 9mm would be 29,416 pounds and the 40 S+W 36,750 pounds.
That in a barrel blank that is bored out some 34% larger for the 40 than it is for the 9mm and with the Glock the external dimensions of that barrel are the same.
The margins are much tighter with the 40 than they are with the 9mm.
Last edited by Armednfree; 03/19/17.
