I've been thinking about getting a 10 MM conversion barrel for my G30. What has kept me from doing it is the price and availability of 10 MM ammo. I may order the barrel just so I CAN use 10 MM if I ever want to......
Its like me with that first call. 10mm is by all objective standards, a better round. Just good luck finding it and better luck affording it. When I got my DPMS Sortical on sale, I could have gotten a 6.8mm flattop for less than $100 difference. I declined in both cases. Better an inferior catridge I can find and afford to shoot than the "best" cartridge I can't. I believe in the market, but it does not always reward excellence. Sometimes, affordable mediocrity wins.
FQ13 who is typing this on a PC. Enough said.