I got this from another forum.
News and Press Releases
PRODUCT WARNING AND RECALL NOTICE: WINCHESTER® WILDCAT® 22 & WINCHESTER® XPERT® 22
Olin Corporation, through its Winchester Division, is recalling several lots of its WILDCAT® 22 (Symbol Number WW22LR) and XPERT® 22 (Symbol Number XPERT22) 22 Long Rifle rimfire ammunition.
Lot Numbers containing Letters: XN, YA, YB or YC
Through extensive evaluation Winchester has determined the above lots of WILDCAT® 22 and XPERT® 22 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 and/or death when fired.
DO NOT USE WINCHESTER® WILDCAT® 22 RIMFIRE AMMUNITION WITH LOT NUMBERS CONTAINING LETTERS XN, YA, YB or YC. The ammunition Lot Number is imprinted (stamped without ink) on the outside of the right tuck flap of the 50-round box, as indicated here:
DO NOT USE WINCHESTER® XPERT® 22 RIMFIRE AMMUNITION WITH LOT NUMBERS CONTAINING LETTERS XN, YA, YB or YC. The ammunition Lot Number is imprinted (stamped without ink) on the outside of the top tuck flap of the 500-round box, as indicated here:
To determine if your ammunition is subject to this notice, review the Lot Number. If the Lot Number contains the letters XN, YA, YB or YC return the ammunition to Winchester via United Parcel Service (UPS). Securely pack the ammunition into a corrugated cardboard box, write “CARTRIDGES, SMALL ARMS ORM-D” on the outside, and ship to:
Olin Corporation – Winchester Division
Powder Mill Road, Gate 4A
East Alton, IL 62024
Attention: 22LR Recall
Please include your name, address, and phone number. Winchester will send you coupons good for replacement ammunition from your local Winchester dealer.
This notice applies only to WILDCAT® 22 and XPERT® 22 rimfire ammunition with Lot Numbers containing the letters XN, YA, YB or YC. Other Symbol Numbers or Lot Numbers are not subject to this recall and should not be returned to Winchester.
If you have any questions concerning this recall please call toll-free 866-423-5224 (U.S. & Canada), write to the above address, or visit our website at www.winchester.com
We apologize for this inconvenience.