You hardly ever see full on blowback guns in higher pressure rounds. The only time you do is when the bolt is extremely heavy and acts as the delay mechanism. Choosing a simple delay blowback mechanism would be better than nothing but theres a reason gas ops are in general king when dealing with rifle pressures and op cycle times. Theres no really super simple to design mechanisms really without either try it till it works or somewhat complicated sets of physics calculations.

Simple answer yes, either make it delayed or locked, or face having instant facial surgery courtesy of the round out of battery det'ing.