I think I might try some slow 150s as well since I have a bunch of them. But that loping 140 sounds interesting.
I'm hard pressed to tell the difference in wound channels in hogs between a 140 partition and a 139 Interlock at any speed a 7-08 (or 7x57) will launch them at.
A partition will work but at those speeds I'd use a 139 Interlock. They're cheaper and work great.