That .567" is definitely their standard sporter contour. My .30-06 M77 22" shows .568" and a M77 .223 is .567" at 22" as well.
Fwiw, a Ruger #1A .250 Savage is .562" at the very tip of its 24" barrel, just ahead of the front sight band.
That .672" figure matches their #1S contour, my .30-06 #1S is .671" at 24".
In still more fwiw news, their Model 77 magnum contour barrel runs .627" at 24". Hmm, wonder if they meant to make that first African on the magnum contour barrel and someone at Ruger transposed the last two digits on the spec sheet...
