Big Ol Gobbler
The 240 XTP has probably killed more deer from a ML than any other bullet, but I would recommend to you to get ahold of a box of Speer Gold Dot .452 - 300 grain HP's... they are great....
The key to any bullet will be finding a sabot that will load in your barrel, that is one of the reasons that BPI/CVA recommends the Powerbelt, saves a lot of time trying to explain the tight bore. Harvester makes a bullet like the Powerbelt, called a SaberTooth and they are less expensive than the PB's..
http://www.harvesterbullets.com/
It is/was my understanding - originally the 240 grain was a 44 cal bullet (.430) but I know think Hornady makes both a 44 cal and a 45 cal (.452)
Check your box it should tell you which one you have...