LW 40 to 9mm for 3 of my G23-3gen.
A KKM 40 to 9 for my G22-3 gen (Threaded for the LW Comp.) + a LW for the same. A Bro-Sto 9mm for a G19. A 40 to 9mm 17L length That I use in both my G35 and G22. I will keep it with a G24 when ever I find another. A 40 to 9mm LW for a G27-3 (sold the pistol still have the barrel.) I had LW 357 Sig barrels but sold them all, that round is to hard to reload.
I just recently bought a KKM .40 to 9mm for my G27, had it out three times now, it eats everything and is very accurate, couldn’t be happier.
Years ago I bought a 6” Jarvis.400 10mm for my G20 for better case support, shooting lead and accuracy, it’s a wonderful barrel! I noticed Jarvis does not list this barrel any longer, wonder why?
I have a stormlake 10mm conversion barrel for my 30. It sucks, won't return to battery, took it to a "gunsmith" no change. Think I'm gonna try a lone wolf 29 drop in barrel and see how it goes. Heard of others doing this with great success.