Thanks for all the inputs/feedback/advice. In my rifle my LabRadar sassy I'm actually getting 10-15 fps more than the advertised velocity. On the first doe that left a minimal blood trail for over 1/4 mile, it must have been shot placement, but i don't know why - the shot felt good. On the one recovered deer with the 143, it still ran at least 140 yards after a double lung shot and just punched too small holes thru the lowest lungs, went thru the top of the heart, and exited. In my mind that is just unacceptable bullet performance. On the last doe i fired on at 305 or so yards, i know that was a good shot..no follow thru issues, shot wads steady off a Caldwell Magnum tripod in a pop-up blind, and no blood trail at all. Sure sounds like a miss, I know, but that rifle shoots these roping sub 1/2 MOA and there was no "buck fever" involved either. Just a big mystery on that one. Nobody is perfect, I know, but I've been at this a while and I almost call a bad shot and this one felt as solid as any I've ever taken.
I think I'm going to either go to the 147 ELDM that this rifle REALLY loves, or shift over to a Barnes LRX. Barnes' have never failed me, but at least on my 338LM the surface texture is a little rougher than a jack eyed bullet and makes reading the concentricity measurement a bit harder. I usually intentionally shot does just behind the front shoulder to avoid wasting meat (bucks I ALWAYS go for the shoulders to up the odds on anchoring them or very short trailing). Oh well, guess we'll never know for sure on two of them, but the one that was recovered with the little holes in the lungs and heart that ran 140+ yards still concerns me, A LOT. I'll try to follow up with Hornady, but they don't know me from Adam and I doubt there's much they can say or do.
I just know, in my case anyway, I'm done with the 143 ELD-X on whitetails.