Hi all. I have two M77’s (.270 and .300WinMag both tang safety models) and love them. I’m pretty meticulous about maintenance. I just inherited a 3rd in .338WinMag that I know pretty well in that it’s always been a great shooter (hand loads) and I also know the barrel has never or rarely been cleaned and the last time was at least 20 years ago. This gun likely has less than 500 rds through it but that’s about as good a guess a I have. What do y’all think I can expect when I try to clean the barrel? I’ll do my best then take it to a gunsmith for a proper bore scope but I’m kinda dreading the cleaning process on this rifle.