Hodgdon's online data has 7mm08 in the handgun section. There you can see what they got with a 15" barrel.
I actually have looked at it. They only list Hodgdon powders interestingly enough.
Also, I run into almost the same issue as looking at data for the longer barrel stuff. The closest I can find is an old Hornady manual I have in where they used a model 7 with 18.5" barrel for their tests. However, they only have the old'n powders listed. It is interesting to see that their data max's out at 2600fps for the 139gr bullet.
