That's what I've been looking for (and looking and looking), but all I can find is the "calibre overview" which doesn't seem to tell you about bolts or magazines (just barrels).
Unless it's the "combinator", which requires flash so I can't load it on my phone (which is all I use)?
Does anybody happen to just know the answer, perhaps from experience? .308 and .300 win mag are not exactly obscure calibres or an odd combination to own. And there's usually an answer for everything on here.