If it happened to an experienced reloader or shooter, He could probably rule out any real problems and would know what went wrong. the fact that you bought it at a pawn shop and the owner is unknown leaves lots of unanswered questions. If the pressure was high enough, you could even have bolt lug setback and this would be an indication of the over pressure that could render the action unusable.
You can buy a new bolt action for just over $300.00 and replace it and not worry about failure.
The other approach would be to cut your loses and start over. Ether way could end up being the close to the same cost and much less risk.
Better safe than sorry.
J E CUSTOM