Thread: Same load increased velocity 🤔

Similar thing happened in my mates 6.5 was carbon ring build up. It was a prick to get it cleaned. Solvent and nylon brush in a battery drill. Finally worked it out by checking the distance to lands using the hornady gauge, was different from when new. After we cleaned it everything went back to how it was previously including the accuracy. He was very close to putting a new barrel on it. Can see the benefits of a bore scope after that.