All bullets are definately not the same...In my .243, hunting deer since 1980 I have killed several deer with the following: 100 gr Remington CoreLokt, 100 gr Remington Premium BTSP, 100 Gr Hornady Custom Interlock, 100 gr Nitrex GrandSlam, 100 gr Winchester Supreme PowerPoint, 100 gr Winchester PowerPoint, 100 gr Federal Classic, 100gr Federal Premium Nosler Partition, 100gr Federal Premium Sierra BTSP, 85gr Federal Premium Sierra BTHP, while all these killed deer....Some gave pass throughs every time...with a small exit wound....some gave pass throughs most of the time with a 1 1/2 inch or so exit wound....and some very seldom gave pass throughs....I did see a pattern develop as to how far a deer traveled on lung shots with certain bullets....

Assuming you are hunting deer, both the Nosler Partition and the Accubond should give good performance...

I would ask other 300 Mag shooters what they shot for the type game hunted....When my brother bought a .270 a few years back, I asked a friend of mine what he used....Federal Premuim 130 gr Sierra BTSP...I sighted in with those...and brother has used since...