Heavy, hard-cast bullets are all the rage, now. Some would have you believe that if you aren't shooting a 325gr bullet, you aren't serious. Your choice of the XTPs is a good one. I would probably go with the 240, but that's just me. Use whichever one is most accurate. As far as your distance of 75yds., you have plenty thump for whitetails... Most anything else, for that matter. A .44 slug at 1100-1200fps will still have about 1,000 foot-pounds of energy at 100yds. Certainly more than needed for most whitetails, and entirely adequate for larger species. Practice until you have no doubt about your ability, then go hunt... And ENJOY!,,,,,,,Bug.