Yep. What happens is the extractor pulls the round from the chamber but slips as the neck goes over the lugs and releases it. Bolt cycles and feeds new round jamming it up and into spent round. The new spring/plunger/oting makes sure it doesn't slip off the head. You should see less extractor scratches on ur brass. If it doesnt work ill buy the spring kit from u haha can always use spares. Their shipping was great when i ordered. Shipped same day priority usps and at my place 2 days later