That's nuts! I've got guns with literally 50k rounds or more through them. Never needed to change a spring.I change my recoil springs every 5,000 rounds, I am referring to the complete recoils assembly, now on the the plain spring, same amount of rounds or if the spring is 2-3 coils shorter then a new one, which ever comes first.
For the record, I kept the box tops from the 1000 primer boxes. When we moved 2 years ago I counted them. There were over 900. I've shot a LOT. Never had to change a recoil spring. 5k rounds is nothing.