I just cleaned my factory Savage barrel (.308) and I’m getting ready to go out and check zero before a match 2 weekends from now. How many rounds is necessary to get the good copper back before checking/adjusting zero. Also I run factory Gold Medal with 175 SMKs but I’m wondering if I can use some federal premium 150 ballistic tipped hunting loads to fill the fouling back in or if it’s recommended to use the gold medal?