I was out last weekend in the Texas Panhandle doing some Goose hunting. 18 degree weather, snow/sleet. It was about an hour of being out in the weather, before the Geese got up, when I took my first shot my Extrema had a hard time cycling the second shell. I was hunting it using no lube as I knew it would be cold so I don't think it was a lube problem. Any ideas?