[Happy Rain]

In the coming insurrection the effectiveness of the round versus the expense of the round may matter less.
A rifle chambered for the 9mm may still fire a powerful enough projectile and is certainly a heck of a lot cheaper to keep loaded.

Most of us are not snipers and a 9mm chambered carbine (the extended barrel adds about 300fps) could be the most efficacious home defense system for Joe paycheck to paycheck Six-pac in the current race to prepare for the coming totalitarian tyranny of the Marxist Obama.

[Chainmail]

"Most of us are not snipers..."

Then you need more practice. There is no excuse for poor marksmanship skills.