When i load my gun for a hunt i leave it in a gun case in the back of my truck and never bring it in the house or cab . I brought my gun once into the cab after being outside in freezing weather , and noticed it was covered with condensation as was the inside of the barrel so i put the barrel down and then a few minute later i dried it off and changed the load just to be safe . Then i put it back into the gun case in the bed . So if i ever bring in into the house or cab again i will always change the load , but better just to let the gun stay cold . But i use loose powder and never have used pellets . Only miss fire i have ever had was when i was messing around with BH209 and my .25 acp conversion . But i only use 777 loose powder now .