My 30/06 barrel is cut with a tight reamer and throated to accept a 200 Match King seated to just above the base of the neck. I suspect I would have been able to go a little hotter but accuracy is good and velocity is high enough.
Another '06, a BRNO ZKK with a 24 inch barrel, had along, funnel shaped throat. In it, I loaded 58 of the old Hodgdons 205 with Speer 200's and got right at 2700. Very accurate. GD