High powered (+P) and really cheap are mutually exclusive terms. Buffalo Bore is loaded heavy but will run $1/round and up. Others are up to $2/rd.
What kind of firearm are you going to use it in? Few are really suited to high powered .45 Colt ammo
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball