I had doubts about buying a 10mm for all the reasons you just mentioned, but once you have the brass reloading the 10mm doesn't really cost any more than a 40 because you're using the same bullet, primer, and a couple more grains of powder. Once you have the brass the price difference is pretty minimal if you reload. If you've got to buy the factory stuff, then get ready to pay big bucks.
I keep hoping that Indiana is going to allow the 10mm for hunting some day, but who knows if/when that'll ever happen. For me, I'm in a position that I can just about never sell mine now. I reloaded so much ammo that I could sell my gun, but then I'd just be sitting on about 1000rds of handloaded 10mm that I couldn't sell. I'm not complaining or saying that's a bad thing, it just is what it is.
I keep hoping that Indiana is going to allow the 10mm for hunting some day, but who knows if/when that'll ever happen. For me, I'm in a position that I can just about never sell mine now. I reloaded so much ammo that I could sell my gun, but then I'd just be sitting on about 1000rds of handloaded 10mm that I couldn't sell. I'm not complaining or saying that's a bad thing, it just is what it is.