OP here. The reason I made this thread was I wanted to see if there was any reason to buy a .45 and convert it to Super vs buying a 10mm and I didn't get any reason to change my mind. In another thread there was someone who said something to the effect of if they were choosing a 10mm they would prefer a long barrel for the velocity gain, but for .45 prefer the short barrel because the .45's extra mass makes up for the decreased velocity.
That made sense to me and even from a short barrel .45, I would not have much reason to choose .45 Super when .45 +P is sufficient enough.
I can understand why a lot of people would rather go .45 Super because they already have .45 pistols, but I don't, so it doesn't seem logical for me to just because people have .45 fever. I'll chalk that up to people probably having owned .45's since before 10mm even existed. Whatever the case, I don't like to make topics based solely on what I'm looking for or my situation, but for anyone who may be like me in wanting a powerful, yet practical semi auto that's is fairly light in weight, but high in firepower and capacity and isn't sure if 10mm is the way to go or .45 Super is better.
So, after waiting about 2 years for a used Glock 40 to show up somewhere with a good price tag, realizing that's never going to happen, the gun buying rush and panics due to 2020, and sales taxes being added to more and more online gun stores, I finally decided there's no time like the present bought a new G40.
I should have it just in time for my birthday next week
One of the reasons for doing this was I have been finding 10mm brass at my range the past few months (last count it was over 200 cases worth) and have yet to see any .45 Super brass and it's nice to be able to shoot a new cartridge and not having to buy brass to do so. Also, with the availability and price of 10mm getting better and .45 Super still being stuck as a boutique only (Buffalo Bore, Underwood, Doubletap) caliber that costs $1.50 a round, I figure that there are few others at my range who will ever bother buying that ammo and shooting it.
Free brass was a factor and while I may have ideas to load up .45 ACP brass pretty hot to use in a Ruger Redhawk, that isn't something I'd want to do in a .45 Super pistol.
So, from what I have experienced, if someone is looking for what I was looking for, the answer I have for them is that 10mm is a better choice than .45 Super.
Fin.