You can also look at all the stats and buy the newest rifle in an elk killing wonder cartridge for long range. That doesn't change the fact that if you don't have ammunition, all the awesome stats will not kill an elk. You stated very early on you are VERY dependent on factory ammunition.
So using ammoseek.com today what are your options.
.270 Win - No ammunition found
.338 Win Mag - One choice $4.50 per round + shipping
.300 PRC - Three choices $5-5.85 per round + shipping
.300 Win Mag - 30 choices $2-6 per round + shipping
.30-06 - 83 choices $1.80-6 per round + shipping
.308 Win - Over 500 choices starting around $0.60 per round and up + shipping
7mm-08 - Five choices $2-6.50 per round + shipping
7mm RM - 13 choices $2.10-5 per round + shipping
6.5 Creedmoor - 56 choices $2-6 per round + shipping
6.5 PRC - 13 choices $3.50-7.50 per round + shipping
So ask yourself, do I spend $1600 + optics on a rifle that costs me $100+ per box of ammunition? Or do I spend $1600 + optics on a different rifle and spend $100 per 50-100 rounds? Which one can I afford for my wife or I to shoot and practice and hone our long range skills with? With practice comes confidence in ability, and with confidence comes successful hunts when the time comes to squeeze the trigger.
I'm not saying you shouldn't ever get a .300 PRC or other cartridge for what you're wanting. I'm just saying now probably isn't the time. Wait and see if the component or ammunition situation improves, because right now is just a horrible time to try and find either.