The cartridge shown exhibits the typical deformation that occurs when we attempt to crimp the case mouth onto a bullet where there is no cannelure to accommodate the crimp. The remedy is to back off the seater die far enough so its crimping shoulder doesn't contact the case mouth during seating - or select a bullet with cannelure and adjust die appropriately.

The same effect may occur intermittently if some cases in batch are longer than the case for which the die was adjusted. Be sure to trim cases to uniform length before loading them.

If the loaded rounds with buckled shoulder can be chambered with a firm turn on the bolt handle, they can be fired as safely as undeformed rounds with the same (safe) charge/bullet/primer - unless the cases are so long they're running into the chamber mouth and pinching the bullet (BAD). If they will not chamber without excess force, they can be pulled down, trimmed, and FL sized (without decapping pin) to restore usable form.

Seat/crimp die adjustment instructions (Lee, but same for other makes)-

INSTRUCTIONS:Screw the bullet seating die in until you feel it touch the case mouth. If no crimp is desired, back the die out 1/2 turn. If a crimp is desired, turn the die in 1/4 turn. The bullet must have a crimping groove or it cannot be crimped. Case must be trimmed to same length to provide a uniform crimp. Bullet depth is adjusted by screwing the adjusting screw in or out to suit. Bullets should be seated deep enough to work through the gun’s action. 
CAUTION Seating bullets excessively deep will reduce the case capacity and
increase the pressure