I would take the 7RM and leave the little gun at home. I know that is not the question you asked, but we have to remember that the .243 was originally designed as a varmint round, to be used with light weight bullets. And it was phenomenal at it. Accurate as heck and light recoil.
Then we had some hotrod gun writers that decided the rifle would work on whitetails. And it does. But as in a lot of cases, there are better calibers out there. Wisconsin deer are big, and there is a lot to be said for "using enough gun:.
In my estimation, there are too many things that can go wrong with a Partition in the .243. IF you miss bone, that expanded bullet is going to leave a hole not much bigger than 30 caliber. That is not much of a hole for blood trail, and not much for letting in that cold air that leads to early death. Above that, you are starting with only 85 grains of weight, and the front third of that bullet is going to "go away", just like it is designed to. That leaves you with somewhere around 60 grains of projectile to finish the job. Just about the weight of a standard .223 projectile...
If I was going to use the .243, I think I would use a Sierra or similar; they have a thin jacket and will probably do more internal damage than a Partition. But the problem with them is they may not exit, and then if the deer doesn't drop at the shot, you have a heck of a problem.
Just my honest opinion. I have seen Wisconsin whitetails; worked up there twice, will be there again next month. I would use a bigger rifle...