Mike; I would devise some sort of mechanism for checking the amount of pressure needed to compress your recoil springs. Measure the old and new springs. If the new ones are about the same, and the old one is lower substantially (say 15 lb. or so), replace the old one with a new spring.
Run 50 rounds through the pistol, then check the two old springs; the one with the recent 50 rounds through it now being'old.' If they are different, and the second one installed is around the rated compression level, you had a bad recoil spring in the pistol at first.
If the two springs are the same, and again, substantially below rated compression level (and remember, the springs are rated to be at their given compression level AFTER 'set' occurs), then I would send them to Wolff with an explanatory note.
Hope this helps, Walt