Federal Hydra-Shok; that’s what I’m using, too!
http://www.sgammo.com/product/federal/50rds-45-auto-acp-federal-hydrashok-230-gr-jhp-ammo-p45hs1g
http://www.firequest.com/NL543.html
$27 box of 50, shipping $16 max regardless of order size...Sale Ends Tuesday, August 28th