FQ, if you ever went to the WPB gun show, Georgia Arms, has top shelf, new brass .45 colt 225 gr Hornady JHP's, for about $25-30 for 50 rds.
if it can handle or is rated for +P or +P+ that's good, the recoil factor will be snappy, but so will the other calibers...
Short barrel, reduced bullet speed, at least have a larger caliber. .357 or .45, IMHO.