I just picked up a 50# PSE impala as a starter bow (and maybe to deer hunt with in the future)...My question is what size arrows should i get (weight and grain tips) to practice with and eventually hunt. Should i go by the regular arrow charts that list the size and weight. ...leaning towards carbons at about 29 inches long

If you're leaning towards carbons, ignore the charts. Get the smallest spine range possible such as GT 3555s or CE 4560s and put a butt load of weight up front.

I have a 50# bow. My best arrow out of the bow is 2016s @ 29". 2nd best are Gt 3555s @ 30.5".

Good Luck