Not sure on feed ramps or follower would depend on cartridge think 280 would be fine as its similar in size to 7mag but 284win is short and fat so prob need adjusting.
Bolt face would need to be closed down but that wouldn't be much, Would not be more then $150 i wouldn't think.
With barrel run a faster then standard twist to ensure it would shoot the 162 amax then you still have a shooter out to 600y quite easy with practice ofc, with no brake or muffs to use or carry.
Recoil would be controllable with a good recoil pad.
Or if you want more plr you could get a slow twist to run the 120ttsx or gmx type bullet.
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