If you want a single can for both, and that you are going to use for hunting, this is what I would suggest looking into. I have one in jail for my .350, but it will also handle 300wm (20" min).
*These are a custom run from Otter Creek Labs. Its normal hydrogen specs for its length, except a larger bore that will accept 8.6 blackout, 9mm, .357, as well as all the normal calibers the hydrogen series is capable of* The Hydrogen series are extremely light weight, extremely quiet suppressor...