When you reload and all your friends give you their brass. I've been finding enough bullets, primers and powder to reload 40 (and 45 auto) plus build up a small margin of extra components.
I have shot more 40 and 45 this year than 22LR by a factor of about 20. Just throwing that out there. Most of that was today through Ace's MKIII Ruger. It annoys him that I shoot it better than him. That one is easy- I always shoot other people's guns better than I shoot my own. He asked if I wanted to buy it. (not right now, plus, if I buy it, I won't shoot it as well.)