I just got my Stoeger Double Defense back from Stoeger Canada after i had both barrels go off on me (only when using 3 inch shells, 2 3/4s was flawless) there customer service was great, I took it too the range today and went through 35rnds without a hitch. The one thing I notice was it has a little rattle coming from the action, is this a problem or normal for Stoeger coach guns?