While it was not a 10", I did do the load development for a buddies 12" Encore in 7mm-08. This was a Stainless-Steel Fox Ridge Outfitters Barrel that also had been Mag-na-Ported with 4 Ports. I mainly worked with 120gr. & 140gr. Nosler Ballistic Tips and H-4895 Powder.
While I came up with some really accurate loads in the 12" Barrel, the velocity left something to be desired. I was able to get 2395FPS with the 120gr. Nosler Ballistic Tips, and 2300 FPS with the 140gr. Nosler Ballistic Tips in this 12" Barrel. (or about the same velocity or a little less than can be expected from a 14" 7-30 Waters Contender)
The Muzzle Blast & Flash produced by the 12" 7mm-08 was a sight to behold, and the Recoil was quite a handful. Granted it was not uncomfortable to shoot, but it was considerablly more than expected. In fact the 10" Contender in 7-30 Waters that I worked with was much more pleasant to shoot in terms of both Muzzle Blast & Flash and Recoil. In addition the velocity of the 120gr. Nosler Ballistic Tip in the 10" 7-30 Waters was not all that far behind the 12" 7mm-08 Encore (2258 FPS for the 10" 7-30 Waters vs 2395 FPS for the 12" 7mm-08 both with 120gr. Nosler Ballistic Tips).
While I have not tested this, I would think that in this short of a barrel the 7mm BR would provide almost the same ballistics as a 7mm-08. Granted this is just my opinion, and not something I have actually tested.
Larry