J-Bird ... I think you are over thinking this. You are buying an "economical" rifle and worrying about ammo?
The old rule is spend as much as you did on your gun as you will on your scope. Glass is everything, especially at low light conditions. You should plan on $300-$400 for a proper scope, more if you can afford it.
Then practice ... practice , practice ....
I have an out of the box Ruger M77 Hawkeye .308 with a very good scope. This is a short barreled gun. At 200 yards I can group 3's at 3.0" with federal 165 grain nozzlers. Have shot 10-15 deer over the past 10 years at 100-180 yards.
I am a hunter, not a shooter, learn how to shoot under multiple conditions. Practice your breathing ... forget the gun vise, learn to shoot off of thesame type platform you will hunting from. End or the day, shoot a lot ... learn to breath and relax ...