I'm not looking for trouble, mainly curious.

Suppose instead of a 158gr LSWC, I had these round nose 124gr:

http://missouribullet.com/details.ph...=5&secondary=9

That nullifies any weight difference between the cartridges, and I have to think a lead round nose could only feed better than the truncate tip.

Where I'm going is, with cheap lead, my old .38spl loads were near .22lr costs per round. I think my .38spl plinking recipe was something like $0.08/ea

9mm is tough, as it's a faster rate of fire, and higher capacity. It'd difficult to get much economy of scale hand loading it compared to other cartridges.