I have been using these new super steel shells in my 11-87, they are kicking its butt. I have replaced the wooden fore end twice, they cracked. The o-ring on the gas seal tube is totally shredded. Is this SX4 more robust in this regard? I have shot lots of 3" magnum Pheasant shells through this gun without a hiccup.
Unita is this occurring with the gas cylinder collar in place? I have never heard of a problem like that on the 1187 before.
