Potential headspace issue, weak firing pin spring, or a damaged firing pin. Also might want to check the shank of the cocking piece pin as Savage had a bad batch that didn't get hardened slip through several years back. The hardened cocking ramp of the bolt body will end up wearing away the shank on the pin which can result in a number of different issues.

https://www.savageshooters.com/conte...t-Modification