Besides all the above advice, the only parts failure I've had in one was an extractor spring go bad, so I'd obtain a couple of spare extractor springs.
I'll add - the tools to change barrels - action vise(s), wrench for the nut are useful. I've never changed a barrel on a bolt action myself, but have done it a couple times now with AR's.
The guns are modular in design, and fun and easy to rebarrel & otherwise modify
