skooch
Was the Stevens 200 a centerfeed action? If so it will not fit the McMillan.
Measure the action screws CTC
4.275" short action
4.400" new centerfeed short action
4.522" intermediate length action, sometimes erroneously called a J series
5.062" long action
Not only does the wsm currently use what is known as a large shank, the bolt head is also different. What caliber is yours?
Unsub, you don't want to. Get a SSS or Rifle Basix Sav2 trigger.
There are 2 steals on scoped Savage heavys in the EE right now, snooze you loose.
Cheers