Like I said...load for accuracy rather than speed. I don't think you can load an accurate round in a 257 Roberts that won't pass completely through a whitetail's internals. Yes, I know, but I'm somewhat trying to get you to see the light. A slower round that shoots as good as a faster round might be the best in terms of aggravation and case life...you said you're longest (typical) shot is 150 yards. BUT....you ain't me and I respect that. When I was younger, I'd put powder in there until the case broke, and then drop it down to where the case didn't break and shoot the darn thing.
