I doubt there's any bigger fan of the 308 Win than me, but I'm also not one that thinks it was designed "perfectly" from the ground up.
When it was standardized it was saddled with a ridiculously long throat for 180 gr RN bullets, and has it to this day. Obviously on a custom you can get any throat you want, but it can be problematic with factory barrels which stick with SAAMI standardization. I've had more than one 308 that wouldn't group well with 2.8" OAL cartridges, but would bug-hole with bullets seated out to the lands.
