You dont even have defined a conection point on your claw. The prize is pinned the tick when the claw has a certain Y coordination. Depending on the bullet speed, it can be at Y=710 but also Y=750. In other words: one tick the claw is at Y=690 and the next tick, depending on the speed, it can be way over Y=700. Where the claw is supposed to hold the prize, you can create an imagepoint and before you pin the price, you set the position of the price to that imagepoint:
--> Prize Set Position to Claw (Imagepoint x)
--> Pin Prize to Claw