[Don W]

.308 by Fiocchi: $118 for 200 rounds

6.5 Creedmoor by Remington: $281.10 for 200 rounds.

Hmmm. Tough choice there.

[mylife]

And perhaps the most ubiquitous stuff on the planet...
30.06 an 7.62x54R

[Bulwyf]

I can make 6.5 creedmoor rounds for 62 cents.

I have many rifles in that caliber, but I also maintain 308 as well. The 6.5 is so popular now that finding ammo is a moot point.

I love the 308, but I will say on extensive testing and shooting that 6.5 creed stomps it into the dirt. Hits harder, flies further easier and makes an even average shooter better.