Re: cheapest 22-250 load
55gr Hornady/canular (in bulk) 40.5gr H380 and CCI250. That load has always been a standard for accuracy in my 22-250, the results on rodents though are some what boring, no red mist or anything just tips em over. It is a great load for yotes though.
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.