leanmac

I have a SBE that I waterfowl hunt with in Tennessee. Our "cold days" are at a temperture of around 10 to 20 degrees. Here is the problem. I will shoot the gun and it will eject the 3 1/2" inch shell and it will not reset the trigger for the next shot. This does not happen every time, but once is enough, after all, Tennessee isn't the duck capital of the world. This problem seems to happen more often in colder weather. I do not think it is a lubrication problem. I have tried a number of combinations, as in, little oil to plenty of oil. I only use Benelli oil. Thank you for the help!