I'm just fine with most cup/cores when going medium to heavy for caliber or not pushing them too fast, in calibers 6.5mm and above. Nothing wrong with your average Interlock or Ballistic Tip in .26 to .35cal if it's not going much over 2,800 or so. If I'm going faster than that (or smaller than that), I usually want a tougher bullet to ensure good penetration and increase odds of an exit. In those cases, I'd rather have a moderate exit and blood trail from a Partition or TTSX 80-90% of the time than have awesome exits/trails from a cup/core but only 60% of the time. Many bowhunters say the same thing about broadheads when discussing big expendables vs. penetrators. What do you value most in terms of performance and cost? That should be your guide.
