Ditto all of the above advice. I wouldn't think of chambering it in anything larger from a safety standpoint if nothing else. Plus, even if that single locking lug is up to the task (and it may well be, but with zero-to-none safety margin), given its design I can't imagine the bolt not flexing upon discharge which would do nothing for accuracy and case life. Were it mine, I would shoot it with reduced loads and have a ball with it the way it is. If you want a set of dies for it, I have a spare set of CH-4D R2 Lovell dies I'll sell reasonably.
