Greg,
I would have a gunsmith examine the action for set back in the locking area. In the past I have found several cock on closing Mauser actions to be soft and can have set back to where the action should be in the scrap pile. There are several 98 actions for a little more money and will be much safer to use. When Paul Mauser designed actions he started with about 6 model changes before he had the best action the 98 model. Check bolt face for firing pin hole may be too large
Les Brooks, retired gunsmith
