Gave her 15 min before proceeding to the site of the shot, probably 30 before going into the woods after her. She was almost certainly dead because I was 20 yards or so away in the dark and I would have heard her otherwise.
There was an exit wound approximately 3/4in through the opposite ribs and visible through the pelt, but there was absolutely no blood on the ground even where she died.
It was a high lung shot and the deer definitely couldn't have been more dead, but I believe the bullet did not expand fully based on the close range and high velocity.
I agree with above that sample size 1 is not sufficient to judge but I certainly do not want to lose a deer in the thick stuff.
That's not how expansion works. The more velocity you have, the greater the expansion. As for the ELD-X, it isn't a particularly rugged bullet. Fo rthe close shots that we have here in NS I would want a bullet with a little mor eass behind it to prevent it from hitting far more violently than it needs to. Keep in mind that the 6.5 CM is the darling of the long range crowd and, even though the velocity is modest, the bullet is in for a hell of a test when you smash it into a deer at, essentially, full muzzle velocity.
But you had a couple of things working against you.
1) High lung shot. They are notorious for not bleeding much because, well, the hole is up high. They bleed into the cavity but it doesn't fill to the point where the blood can run out the hole.
2) Leg position. If the legs are extended out (say on a deer feeding on a pile o fapples or carrots) then that can cause the hide to pull forward. On impact the deer runs and the hide goes back to the rear where it belongs, effectively sealing off the hole. Again, the deer bleeds, but it's all internal.
Keep in mind that you're not shooting a particularly large bullet which obviously causes a smaller hole which is easier to have blocked off by a shoulder blade, or skin, or fat.