#1) I had never had an issue with Leupold, still have 2, Vari-X III 6.5 - 20 x 50mm on my custom Model 70 243 coyote rig, an old M1 4.5 - 14 x 50mm on a Savage 112 25'06 LSSFV, rifle alone weighs over 10lbs. Neither has given me issues across multiple rifles since the day I bought both new. A couple of years ago, I had 3 consecutive brand new out of the box Leupold VX3/VX3-HD fail, reticle wouldn't move or they failed to retain zero. I have since quit Leupold altogether.
#2) The following was early on just after the ELD bullets were released. I have been present during or experienced ELD-X failures. We had bullets pencil thru deer, from 80yds to well over 300yds, multiple shots on some animals and multiple failures to expand. We have also experienced quite the opposite, bullets fragmenting on impact, creating craters, massive damage to near side and in one case, the doe shot at over 300yds was paralyzed but very much alive when we found her in the high grass well over 45 minutes later requiring a follow up round to the noggin.
Also heard first hand reports from close friends that had multiple failures with the ELD-X on elk, these are guys I have hunted with for decades. 7 pencil holes in one elk at reasonable distances and multiple holes in another, same pencil holes. Both Elk were recovered and they all 3 were flabbergasted at the complete failure to expand.
These were typical results of the early years of the ELD bullets, I think many here experienced the same results early on. While they were very accurate, the result afterwards was the problem.
While Hornady has made adjustments to their ELD bullets and many have since reported good results with the latest formula of ELD bullets. For me, I still refuse to use them.