"Worth it?" is a hard thing to answer. Depends on how much budget strain it places, how sensitive you are to glass/coating quality (which is governed by the law of diminishing return as you go up in price), conditions you hunt in, reticle preferences, what other things you might forgo to stretch it, whether or not you like the little extras like the alumina caps, integrated level, etc. I have both and for under 300y in typical conditions I like them equally. For longer shots I like the integrated level and illuminated TMOA reticle option, for very low light I perceive a bit of advantage in optical quality but not much, in rain/snow I like the alumina caps. (of course, there are aftermarket caps and levels, but the final fit and finish of the 6HD system is topnotch)
I have the 6HD on my 308. I really like the integrated level and illuminated retice as well and the I would agree the low-light performance is better. I dinged my front cover 2 yrs ago sliding down a chute (not by design) and it didn't want to fully close without a little extra force. Sent it back to Leupold to replace as I couldn't get it off and didn't want to damage the optics trying to force it. I offered to pay the fix and replacement as it was entirely my fault but Leupold replaced it, adjusted the full travel (likely an result of the impact too but I didn't notice it), and sent it back with no charge. Best customer service I have had in a long time. I haven't put anything but a Leupold on since and that covers three new scopes.
Your question is well timed. Just remounted my 6HD on my 308; took it out and zero'd it at 200 yds; then hit the 400 and 600 yd ranges. My CDS dial was dead nuts on with my hunting round. Pinged the 8-in targets 5 for 5 at both ranges. As others have said elsewhere, chrono the rounds you want the dial to match to, provide accurate rifle/round data to Leupold including the altitudes and normal temperatures you expect to hunt at and you should get a reliable CDS dial in return that you can count on. Altitude numbers should be good +/- 1500 ft from what you specify.
They are just so much better than almost any cap out there. I hunt a lot in the rain and the lenses stay bone dry. Swarovski has something similar now.
While I lived in Alaska I ran into a guy that found a Leupold scope in a river up there. He sent it to Leupold asking them to fix it and told them he found it. They sent him a new scope for free!
