Holy crap expansion!!! Nearly 9/10ths of an inch! [ame="http://www.youtube.com/watch?v=gQ7ri9wa728"]Underwood 9mm 115 gr +P+ JHP Ammo Test - YouTube[/ame] This video definitely settles it for me, high velocity light weight bullets are not the best option for SD. Sure, this bullet really expanded violently, but 9" penetration is worse than most .380ACPs. I think 124 +p is kind of a sweet spot for 9mm- it expands well but still penetrates adequately, but I think I would never pick an SD round lighter and faster than that. This video makes me want to lean towards 147 standard pressure.