Also done thier 40-9 on the 22 for shooting lead loads, no problems and thier barrels are first rate! Only problem I have encountered was with a 45ACP barrel on a 21sf with a slightly oversize cast bullet. Sent it back with a couple of dummy rounds and they opened the throat a hair and it works perfectly. Thier match chambers are tight.I have a G22, and I have the standard 40-9 barrel and I also added the extended/threaded 40-9 barrel with the 40-9 comp on it. Both barrels have been almost flawless. I haven't had many failures even using cheap, weaker 9mm. I am using the G17 mags and I also went with the 11 lbs recoil spring because the .40 spring doesn't let the empties fly far and you end up wearing your brass. I would give my vote for getting any of their conversion barrels.
I agree! I have .357Sig barrels for 3 of my .40's, G-27 included. Way I see it, why go down when you can go up! Of course 9mm ammo is much cheaper and recoils less so there could be some advantages. I handload for the .357Sig so price is about the same either way. My Lone Wolf barrel has no appearent advantages over my Glock replacement barrel for accuracy or reliability.As my opinion, Id say get a 9mm gun seperately and get a .357sig barrel for your 27. When it comes to Lone Wolf, no personal experience but them seem pretty popular