Premium bullets are the bomb!
Okay, so that doesn't quite 'say it' well. In fairness, I can't think of anyone other than Speer with their Grand Slams who calls their bullets "premium", so we can give the guys at Cerebus/Barnes a pass.
And just so no one thinks I'm taking a swing at Cerebus, here's a Cerebus/Remington that turned out well, if bullet remainders matter. (And it did make two holes; was recovered beyond the dead animal, unlike the two previous.)
The use of a bullet has a lot more to do with what ends up premium in the results or not. There would be a lot of fault on the user of a 200 Partition in a 300 mag if those results didn't turn out well. There are no grizzlies or moose that can't be dispatched quite handily by any reasonably competent person so equipped.