I used to clean my Handi rifles then set them aside. When I went to use them again the chamber was always full of oil. I finally relaized that the oil I always put in the bor would run down into the chamber. However with the handi there is no place for the oil to go except to run back down the barrel when I picked them up again. However that would always leave the chamber coated with oil. Then my brass would stick. Even unfired brass. The same thing will happen if your OLC is to long.