I have had a Browning BL22 for many years (it was my first rifle) I have never been able to Winchester ammo (of any kind (wildcat, western, etc) The firing pin will dent the rim, but the priming mix just will not light. If I put the same dented rim ammo in my Ruger Single Six they go off without a hitch. Just so no one tries to blame Henry or Browning, I have friends that have had similar issues with Marlin and Remington rimfires as well.