I have several ML's that I kinda keep rotating for range and hunting. I doubt that any of them have 100 rounds down the barrels. Some much less. I've read about using Scotchbrite and chrome cleaner to smooth out the rifling a bit and improve accuracy. All of them shoot well but there's always room for improvement. I would think that using some patches w/chrome cleaner I have around would help. I'm guessing that to get an abrasive pad down the barrel I would need to go to a much smaller jag (36 cal) ? Experienced replies welcome.