I took a new Renm 700 stainless BDL action in 30-06 and had it rebarreled to a 240 WBY with no other modifications and it works fine.
I would think about barrel length, and would go with a 26" barrel, for velocity.
Possibly you could buy or borrow 3-5 loaded 240 rounds and try to cycle them through your action to confirm that it would feed ok.
