The 7mm-08 shares its case from the parent .308 which has been dubbed as "inherently accurate." Truth be told, many .308s that I have shot have been very accurate with at least a couple of factory loads. As such, you should generally expect the same from the 7mm-08. I owned a couple of these and, also with at least a couple of factory loads (or more) I can get sub 1" groups at 100 yards.
To date, the best factory load that has given me the best accuracy is the Hornady Light Magnum load.
Zachary