Yes, I do reload for other .40's, and 9mm, .45acp, .38/.357, .44mag, and a lot of rifle and carbine cartridges.
.40 brass is not a problem for me. I have a few lifetime supplies of it already since I get it all after PD qualifications. I think I'm up to 4 or 5 5-gallon buckets full of it, and that's just counting the nickle coated brass, I haven't used any of the brass case stuff yet.
Last time I owned Glocks, I shot a lot of cast bullet reloads out of the factory barrels in both 9mm and .40 and never had a problem, but I don't want to start having one, either.
I need the beavertail added to the Glock. I have big hands, like a high grip, and with my thumbs forward grip I use on everything else I shoot, the slide cuts the web of my hand.
I'm almost tempted to just sell the Glock instead of doing the mods to it and get something different, like another S&W, but part of me wants to keep the Glock, too.