I get .630 on my 308. No reason to believe the 7-08 would be any different.
Just for comparison I measured several others while I had the mic out.
Rem700, 30-06---.660
Win 70 sporter, 300 WSM---.615 (24" barrel)
Win 70 FWT, 30-06---.572
KImber 84, 308---.560