You will find that anything over 40 degrees is pretty well useless and VERY touchy with sizing. If you take a case with say a 50 degree shoulder, it could collapse the case just seating your bullet if the dies and chamber of the dies are not set up exactly perfect.
A friend of mine got talked into a 300 WSM
improved 50 degree about 2 years ago. He cusses it every time he reloads it. But he loves to shoot it, at least, when the ammo will fit back into the chamber!
I have had several 40 degree wildcats, and they work fine. However, I think 35 degrees is just about perfect for most applications.