LAST EDITED ON Mar-15-05 AT 10:32PM (MST)[p]PappaBull;
You should have done the breakin when the rifle is new. Since you failed to break it in and now have fired 100 rounds, you have a copper fouling problem that has caused your groups to open up larger in size. You will need to use a copper removing solvent to get rid of the copper deposits in the barrel. Shooter's Choice, Sweet's, and Butch's bore shine all make a good copper removing solvent. Just follow their directions and get all the copper out befor you start any breaking in of the barrel. I will repeat this, YOU MUST GET ALL THE COPPER FOULING OUT BEFORE ANY BREAKIN OR BORE LAPPING.
you can do a web search and locate several sites that will tell you how to break in the barrel and help stop or slow down the copper deposits in your barrel. I do not recommend bore lapping to persons who have not been trained to do it. I have seen too many rifle owners end up ruining their barrel by trying to lap it, But before any barrel breakin or bore lapping can be done, all the copper must be out of the barrel.
you will have about 1-2 hours of work to do with the copper solvent remover before you end up with a clean barrel. you can also locate web sites that will tell you how to remove the copper with copper remover solvents.
Recently I have seen posts where hunters have posted information that they heard that you do not have to break in a new barrel anymore, your experience is what happens when you fail to break in a new barrel. Some of the best barrel makers around include information on how to break in your new barrel, this should tell every rifle user something about if they should break-in or not break-in a barrel.
RELH