Get a 10mm Auto, like the Glock 20. The G20 holds 15 rounds of 10mm, which, in its mid-to-high performance range, has more "knock-down" punch than either the .45acp or the 9mm wuss ball.

Double Tap Ammo, Texas Ammo, Corbon, Georgia Arms, ProLoad and a number of others produce full-strength 10mm loads.

As 10mm fans in the States like to say:

"When you're finally serious about stopping power, then you're ready for the 10mm Auto."

Nick Adams carries a 10mm. You should too.