Proper bedding of the entire action ie: recoil lug, and tang as well as removing the steel tube around the rear guard screw (if there is one there) will stop any cracking from ocurring. There should be no metal to metal touching or the action will be loose in the stock and cracking will occur. This goes for any action that is not PROPERLY pillar bedded. In proper pillar bedding, the pillars are one with the stock and then when the barreled action is screwed in to the Tguard, they all be come one together. Touching the action with the TGuard boss or a metal tube around the rear screw contacting the tang and guard is the cause of cracking,not the remedy.

Once cracked, epoxying and cross pinning are the only lasting fixes I know of.