BARNES BULLETS - CR-10 Bore Cleaner 8 Oz

Best bore cleaner on the market by far!

This is a great product for copper fouling, especially for precision rifle barrel bore break in. I found this product as a highly recommended and used product by gunsmith and shooting legend Darrell Holland. It's part of his deep clean procedure and barrel break in process for long range precision guns. It quickly corrodes away copper fouling from the rifling, leftover machine marks, and pores and cracks. Using this product for break in lets you break in a bore in the way that polishes out a lot of the imperfections, and leaves you far less reliant on a copper-fouled bore for accuracy. I follow Mr. Holland's process for the whole cleaning, including his use of this for the copper/lead, but it's not really much different than the instructions IIRC. But you know you got basically all of it when the patches come out clean without any blue/green from the fast corroding away of the copper. It works quickly and the results are great. Have used to break in several precision rifles and a few that aren't precision guns. Also great if you just really want to make your go to war rifle the best it can be. Or for the occasional de-coppering of the bore. You can use it for breaking in a bore that's already been shot a bit, as the copper fouling seals up the pores/machine marks. Removing it makes it possible to go through the fire, clean, fire, clean -style of breaking in a bore. It's an acid, MAKE SURE TO GET IT ALL OUT/OFF THE GUN WHEN DONE. Good for getting all copper fouling and very likely all RUST out of collector's pieces, to best avoid galvanic corrosion of copper-steel over long periods of time. As an acid, it should also get the rust from the iron/steel bore, like vinegar would. I'm on my third bottle I think? It lasts quite a few guns, even with intensive break ins.