First off--special thanks to the guys on here that helped me through this process; I really appreciate the help. So I, like most of you at one point or another, was 10mm curious but not quite enough to shell out the money for a G20/Delta Elite/ect... So, I picked up a 10mm mag, LWD 20lb guide rod and spring, KKM 6'' conversion barrel, and a LWD 10mm extractor and went to work! So far, I have 100 rounds of Prvi 180gr JHPs, 200 rounds of Blazer 200gr FMJs, and 50 rounds of Underwood Ammo 165gr Gold Dot JHPs through this combination with 0 failures of any kind and consistent ejection to the 3-5 o'clock position with all but the Prvi ammo. That ammo jumps all over the place weakly (with either recoil spring) like my Gen4 19 that has been back to Glock 2 times now because I don't think thats acceptable. But, with a conversion set up for hotter ammo, I'm not complaining. I set up my chrono (but forgot a pretty important part; SMH...) to test the speed of these three rounds through this barrel and as expected the Underwood Ammo 165gr JHPs performed well. I'd love to see some of these rounds in ballistics gel because if the recoil impulse is any indication I'm betting they're nasty little rounds. While the recoil is certainly more with the Underwood than the other rounds, it's not enough to discourage you from shooting it; in fact just the opposite. It's good times! [ame=http://www.youtube.com/watch?v=q3lSjm4V4SE&context=C416f5a3ADvjVQa1PpcFNuGowyGR0QR6L9LoQJaxdvYIYUBFmMJO0=]Chrono Test Video[/ame] I apologize for my amateur video skills but I personally like to see the evidence myself.