Consider the 360 Buckhammer instead
Why all the talk about hunting? The OP only stated that he wants a bolt action for shooting cast bullets. His application is unstated.
With that in mind, the 350 Legend might not be the best choice. First, SAAMI specs are for a .357" bullet. That limits choices of rifle style cast bullet molds. Do you really want to be potentially stuck with only using .357 pistol bullet molds?
Second, the cartridge headspaces on the case mouth. Not ideal for cast bullet applications.
Perhaps a better choice is the 360 Buckhammer? SAAMI specs call for .359" bullets, plus it headspaces off the rim. Both are much better for cast bullet uses.
The only issue might be rifle choice. Rimmed cases are not generally well suited to bolt action rifles. But, single shot rifles and rimmed cases are a great combination, and traditionally work well with cast bullets.
A Ruger #1 in 360 Buckhammer (if such a thing comes to market) might be ideal.
Or, just go find an old 35 Remington!
If it must be a bolt action, there's always the classic 35 Whelen.
Anyhow, I've attached diagrams of the two cartridges for your consideration.