What are you basing your info on?45 Super is externally/dimensionally identical to 45 acp or 45 acp+P and is designed to be used in 45 acp semi auto pistols that have been fitted with stronger than normal recoil springs and a shock buffer, plus a couple other modifications. While you can shoot 45 SUPER out of some stock 45 acp+P pistols such as the Glock 21, HK USP or the full sized all steel 1911, you will batter your pistol if you do not have them modified to handle the extra pressure and slide velocity of the 45 Super.
Might not be until spring now, a little too cold for my taste outside. Plus I don't want to loose any 460 brass, the stuff is kind of expensive. I don't get out to Wasilla to the indoor range too often.Thank you for that link to DPM springs. I'm getting one next month. Am considering the Rowland conversion also for my four inch xd. I think the super ammunition is a good choice for my situation in NW Wyoming. Our bears are not as large as yours but close. Light compact eleven round pistol makes more sense than the heavy single actions I've carried along with a rifle. I'd like to hear more of your adventures with the Rowland conversion.