Actually saw 10mm on the shelves for first time locally, both the LGS and local indoor range had Remington UMC for 32.99.  I have enough Underwood 180TMJ that I'll hold off, better to wait for that at $28/box.  But, at least it's available to those who want it. 

I had only shot some PPU and Hornaday XTP 180gr through my Glock 20 previously, picked it up about two months ago.  I got some of the 180TMJ from Underwood from the April 6th batch and shot it this weekend.  Big difference, obviously, but not obnoxious.  Very happy with the quality and price for Underwood, was able to get a few boxes of the 180TMJ from today's batch and doubt I'll buy any more of the weak "range" ammo offered by other manufacturers if I can help it.