To chamber a .243 on that action it would have to be made from carbon steel...
Pretty hot even for that, IMO.
I have heard of at least two Dakota #10 actions that cracked/broke at the draw bolt web/safely recess when tightening the bolt after case hardening. One at (almost) final assembly of a fancy custom project.
But I'm just a stick-in-the-mud traditionalist who favors my fingers on my hands. You go right ahead... that is if you can reassemble the action? I spent about 3 days reassembling a Browning M-78 many years back.