My gun is supposed to be delivered tomorrow

I went shopping this weekend and purchased some 155gr XTP's on sale ($10 for 20 w/sabots). I plan on (at least to begin with, and since ML season starts Saturday) shooting 777 pellets (45/50). A couple of questions.

Will these bullets be effective on whitetail and wild hog? If not, what is the min. bullet weight that will be?

The stand I'll be hunting at on Saturday will not offer a shot over 80 - 100 yds. What would be a good load to try (with these bullets and the 777 pellets) for this application?

Thanks again. I can't wait until tomorrow!!!