The Olympic .30-06 has some interesting properties. It's reasonably accurate, only one out of 400 rounds failed to chamber in my Remington 700, and doesn't seem to be lacking in power.
But it's dirty, smelly, and a pain in the ass to clean. It seems like they're propelling it with charcoal or something.
However, it has one very fun property: It has a HUGE muzzle flash. And by HUGE, I don't mean large. I mean gigantic. The ball of flame from the front of my rifle was the length of my rifle, and maybe 2-3 feet wide. It certainly would be an interesting experience for a full-auto nighttime shoot where it'd look impressive.
Seriously, I had range officers and other shooters asking what new ThumpinBlitzenBoomin' round I was firing, and when I informed them it was "cheap Greek .30-06" they were amazed.
But unless you like cleaning for a long, long time after shooting it, it's probably not worth it.