Own a pile of them because my 6.5 PRC absolutely loves them, but have only taken one WT with them, which isn't the best test. Haven't been ultra thrilled with 143 ELD-X on deer or elk, so wanted to try something different. The 143 ELD-X, while a perfect bullet in the CM for which it was designed, is maybe a little lightly constructed for 6.5PRC, IME. Still effective by the animal-is-dead measure, just not as much penetration as I'd like to see on broadside chest shots without any major bone contact.