Factory loaded or your reloads? First thought is head space. Not chamber issue but ammo too short? Firing pin hits primer, case gets pushed forward in chamber and you get FTF.

Either way, pull the bullets out a bit to increase the OAL, bullets jammed into the lands will hold the case head against the bolt head. Once fired, if reloading, make sure the shoulders don't get pushed back too far and you end up with the same problem again.