So yesterday my buddy and I took the rifles to the range for some more practice and we brought along his new brother-in-law. After a good shooting session we shot the breeze for awhile and as we were packing things up i made the comment that i had to give my rifle a good cleaning when i got home, to which the brother-in-law replied and told me it would be unethical for me to clean my rifle barrel because it would change my zero and i wouldn't have any idea where my shots were hitting. I explained to him that i had never had any problems like that and that i was taught to always clean my guns after every time i shot them and my buddy said he was taught the same thing. The brother responded by saying my friend and i were unethical and irresponsible hunters and gun owners and we should have our firearms taken away. I shrugged it off as some peoples views are different than my own but i am curious as to what your thoughts about it are? Have any of you ever had a problem with a change in your zero from cleaning your rifle?