Remington recently announced a recall of two specific lots of .22 LR ammunition due to the possibility of an insufficient crimp on the bullet. Remington is offering an exchange of the ammo if you contact them.
The full recall notice:
Consumer Product Notification
Remington Rimfire: 22 Thunderbolt® TB-22A
22 Long Rifle Ammunition
Remington has determined that two specific lot codes of Remington 22Thunderbolt® ammunition may contain rounds with an insufficient crimp on the bullet. This issue is specific only to lot numbers: S22BB1237 and S22BC1237. Handling or loading this 22 Thunderbolt® ammunition could result in the separation of the bullet from the shell casing. In certain situations, this occurrence could render the firearm inoperable.
If you have recently purchased a box, brick, or case of Remington 22Thunderbolt® ammunition with the specific lot numbers: S22BB1237 or S22BC1237, Remington will exchange this ammunition at no charge. For questions, or to arrange for exchange and replacement of this 22 Thunderbolt® ammunition, please contact the Remington Customer Service staff at: 1-800-243-9700, Prompt #3.
Remington would like to apologize for any inconveniences or concerns that this issue may have created for our customers. We thank you for your continued support of Remington firearms and ammunition products.