[stressed]

Hey guys. I have the wolf extra power 40 pound recoil spring the extra power striker spring in my luger. I just got back from the gunsmith gun is superbly clean. Action functions like butter. Problem being is even with extra power Springs it still fails the tape test with regular Remington umc 115 and American eagle 115. These loads averaged 1050 or so over chrono. Why is it battering the toggle back? Feeding and function is flawless so I think a heavier spring will be fine.