Well, whether using my own pick-ups is feasible depends on where my gun chucks its empties. My 9mm's send most of their brass behind me, but my .45 sends about half of it over the firing line, never to be seen again (which is a huge bummer, with .45 brass at ~$60/k). Being able to use cheap eBay brass means I don't have to be super anal about picking up my own brass.
Anyone familiar with the ejection pattern of a Walther P99? (which is the .40 that has me thinking...)