I have the same gun as you. I agree lots of undeserved bad press for the 264 wm. In my opinion it's a fine round. I also shoot Kole Connely's loads in it, but I opted for the 120gr Nosler Ballistic Tip this year (whitetail only). So far no complaints. Honestly though, I don't think I would feel comf'y trying an elk at 500 yds. with the 264.
By the way, I also have a Lazzeroni 7.82 Patriot (the Lazzeroni .308 short mag). As far as cost for that one, I got the Savage version at $500. Now that's less than most gun shop Rem, Wins or Brownings. Yep, the bullets do cost a mite, but them suckers do shoot good. Less than 3" MOA at 300 yds. By the way, I'm trying to talk Kole C into loading up the Lazzeroni's. He says he might look into it next year.
Can't imagine a much flatter shooter than the 264 win mag being needed, but if someone were to come up with one of them new fangled shorts it would probably be a winner. Can't imagine getting much more than what my 264 does though.
In answer to your question to another poster on the 120gr under another topic, I haven't had the problem of bullet break up (at least yet). I did quite a bit of research and talked to some long time users of this load before changing. Pretty much everything that was said by users seemed OK, and so far it has lived up as advertised.
Not saying that it couldn't happen, because I've had that happen on an 06 before, so I know it can, but I don't think it is a problem that will make this load unaccpeptable. I would be concerned with a partition style bullet with this caliber, as it would most likely pass through with little expansion (little in/little out/little damage/little blood).
After the 2nd season, I'll be able to give you a better report on bullet performance, I hope.