From what I've seen the major hunting ammo manufacturers put out this year, there isn't a 308 line and a 6.5cm line and a 300wm line. It's all the same, they just swap tooling and run it for however long they need to produce what they want to produce. The 308 line is the 6.5cm line. The question is how long it's making 6.5 vs 308, but it's not an equipment limitation to either.YMMV, around here the creedmoor is less available than .308 or .223 and at higher cost. .308 168gr GMM or 168gr Hornady is $30 a box at the Cabelas, Creedmoor is $40 and up. people buying Creedmoor rifles also means ammo is gonna squeeze because nobody's gonna replace a .223 or .308 manufacturing line with a Creedmoor line.
When it comes to a question of ammo availability, especially for high precision hunting ammo, the answer is always to either buy in bulk or reload, IMO.