I have seen everything now. Someone actually compared a boattail to a Partition. All I can do is shake my head. Boatails are notorious for slipping cores, especially in the .243 caliber. A partion is going to penetrate, period. No questions asked, a Partition is one of the greatest bullets ever designed. It will get the job done.
I do need to know. If Zrex were facing a grizz would he rather have his .243 with a 100 grain boattail or a factory loaded .45/70 405 grain Remington. The .243 is faster and has more kinetic energy but the .45/70 will get the job done whereas the 243 won't.
Zrex,
Choose the better elk cartridge .270, .280, .30/06, .35 Whelan or a 9.3x62. All have about the same kinetic energy (that's how educated people to refer to ft/lbs). How do you choose? I would use all but the Whelan or the 9.3 would have more thump. Those large bullets moving at moderate speed get the attention of any animal.

Dr Fatguy