In my younger days I didn't know better and used the Hoppes cleaning kit with the bronze brushes,3pc screw together rod,etc.Most definitely a mistake!Only nylon brushes should be used-never metal along with a synthetic 1pc rod.Metal rods and brushes can ruin the bore.As far as cleaning solutions go be sure it works on copper or it will build up over time and accuracy will drop off.It's easier to get all the crud out if you let it soak over night.Good luck!