I have a 110 tactical and I did the break-in. A tedious process it was but it was worth it. I could see towards the end my rifle was really starting to shoot or at least wanting to shoot. The lightest bullet I have shot was the Barnes LR 127gr. They shot really good. As stated above I don’t think it would be a bad idea to “start over” and try a break-in process, with the right stuff. There is so much out there I wouldn’t know where to tell you to begin. I used Buch’s Bore Shine. I also use a Dewey Rod.