its either a spring problem, or the bolt's been shaved down or lightened. Does it have an aftermarket bolt handle?
Whats probably happening is the bolt is extracting the case as its igniting, causing the case to become unsupported.
Get a new recoil spring would be #1 on the list
Whats probably happening is the bolt is extracting the case as its igniting, causing the case to become unsupported.
Get a new recoil spring would be #1 on the list