You’ll love the M600! It is by far one of my favorites in the safe!
I have one in 308 I haven't even shot yet, thanks brother
I carry my M600 350RM likely more than all of my other hunting rifles combined. It is very nimble and is a dream in the mountains.
If you have an issue sourcing brass on here, check out “riverofguns.com” - it is essentially a search across many different forums. Maybe it could help you locate some!
Otherwise, I’m sure it’ll eventually pop on here! I don’t feel it terribly uncommon for the old Rem Mag calibers to pop up.