Here are two 143 ELD-Xs we pulled out of TDNs bull this fall. Distance was 425ish, and chambering was a 6.5 PRC.
I used the same bullet from a 6.5 SAUM last year and killed a bull a bit over 500.
I also saw three bucks taken quite spectacularly at ranges from 10 yards to about 200 with the 143 ELD-X from a 6.5 Creedmoor this fall.
Count me as a fan of the bullet.
Dave