From the Win website, the recall was dated in 2006, but still a go idea to check the ammo because I'm not one to pinpoint exactly when I picked up .22 ammo.
Olin Corporation, through its Winchester Division, is recalling several lots of Dynapoint® Magnum 22 Win. Mag. 45 grain Dynapoint rimfire ammunition (Symbol Number USA22M).
Lot Numbers (first three characters): 1WN and 1XA
Through extensive evaluation Winchester has determined the above lots of Dynapoint® Magnum 22 Win. Mag. ammunition may contain double powder charges. Double powder charge weight ammunition may cause firearm damage, rendering the firearm inoperable, and subject the shooter to a risk of personal injury when fired.
Be safe and check it, if in doubt, it's just poor quality .22 mag anyways, TOSS IT !
What are you gonna do, talk the alien to death? -- (on Sigourney Weaver's worry about Guns in Aliens)
"Safety is something that happens between your ears, not something you hold in your hands."
"I carry a small gun to compensate for my huge Blue press."