[dangerdoc]

Depends on what you feed it.

10mm can suffer with under penetration because most HP rounds are designed for lower 40 S&W velocities. The HP opens up too fast dumping energy too quickly.

10s are definitely more than trail guns.

[Cobra64]

My preferences are 9mm and .45 Auto and I reload for only those calibers..

.45 for fun in the sun...

.

Nine is fine for serious work...

"Steel is real."

Your mileage may vary. :-)