Calmex,

I run my 10mm brass (shot in a Glock 29) through the Redding "GRx" sizing die before reloading. Mine requires lube-- I use Imperial wax, but there is also a carbide version available. Midway or Brownells are both good sources.
I have re-sized only once, so far, but there were no failures and the brass all looks good.

Mike