I use 150gr because I dont' think anything more is needed for whitetail and I like that it's a little flatter shooting. It is also available in factory loads with a number of different bullets and since I reload, there is A LOT of load data.
In all honesty, I wouldn't be afraid to use anything from 130gr to 180gr for deer here in NC, although 180 is a bit heavy. If you go to 200+ you might get some funny looks.
If the pain is lacking so is the discipline...
"the only 911 call I need is chambering a round" - Mr. Muller, MO car dealer