lone hunterut
I still use a 300 grain bullet for Elk - looking for more penetration @ longer ranges, but for deer I do back down to to the 250 area. The 250 SW probably would do everthing you want a bullet to do, with better velocity, and flatter shooting than the 300. I am currently shooting 10mm 200 grain XTP's (to cheap to pay for SW's or SST's) - the flatter shooting, velocity, and energy the bullet carries out to 150 yards will do in any whitetail I am hunting.
My only complaint???? about SW's is at the velocity that most are shooting them and @ close range thay tend to pass though the thin skin of a deer and the soft tissue without much expansion... In fact it is a pretty clean wound channel...The animal is dead but it might take awhile before it knows it. Yet on the other hand the HP's that I shoot are great and work well to 150 yards but after that your SW's really out perform them.
For thin skinned animals I vote for the 240/250/260 class bullet, UNLess you a shooting all lead... although, I still wantto try the 200 grain on whitetail this year - I am convinced it will do the job.