cr500
If you go to the 500NE 3" then it will be doable & not modify the action, only the safety.
Mine I got a barrel especially long at 30+" as I use it Group 3 & also for BP Express comps in BGR events.
Yes you need as much weight as possible & balance is the key!
Touching off 570gn pills at 2150fps in an 10 1/4lb rifle is memorable! (quite fun really but not more than 10 rounds as I get a bit of a headache after that!)