I've wanted a 9mm barrel for a while now. My only concern was the .357bore versus a .355 bore. I know I shouldn't be so dern picky, I just wondered about loss of velocity and accuracy.
So please convince me!
FWIW, you HAVE to get a .357 mag barrel. Light, cheap and fast loads like Winchester USA 110 jhp's are great fun and very accurate out to 100 yards. I use them in IHMSA field pistol. Recoil is just right.