RE: need advice on caliber
If you're just hunting deer, get a .308.
If you're also planning, and will hunt elk, the .300 Win. Mag. would be good, but a .308 180 grain will take down an elk for sure.
So, the .308 150 grainFederal Powershoks cost just $10.97, and they make great practice rounds, and they are alsogoodfor taking deer and varmits.