I've been gone awhile, apparently there's a recall on this stuff? Which lot numbers? I picked up 2,000 rounds of it recently and shot some without any ill effect.
Nooooo ... your ammo just isn't on the recall list. I will, however, step up and take one for the team by bravely volunteering to test fire your ammo to verify it is truly safe. Let me know when you're available to drop off the suspect rounds.
According to a Winchester employee, the recalled M-22 ammo was manufactured in April 2013. It would probably be a safe assumption that any you buy today was manufactured later than that and is okay. Surely, with the demand we are seeing, .22LR made a year ago hasn't been sitting in a warehouse.