JIm, I have a 725 Browning. The bottom barrel will not fire some shells that have a deep set primer but top the barrel will. I it possible for you to make me a longer firing pin? I have some ideas if your are capable of this task. Respectfully Bob WilliamsI bought two sets recently for my gun and a friend's gun. They came right away and look to be the perfect tune up for our guns. Thanks for making these available to us BT-100 shooters. And thanks for the quick turnaround.