I have had a few firearms but am wondering about how to clean a new hunting rifle. I have shot it once and plan on taking it to the range to get it sighted tomorrow. What is this I hear about not cleaning the barrel as it messes with the accuracy and consistency of the shot? Why is this different than any other gun, say a pistol or a fun gun (AK-47)? Thanks for the help, Im new on here and new to the hunting world so any advice would be appreciated.