BoydAllen
Gold $$ Contributor
FYI, the most accurate shooters in the world, at 100 and 200 yards do not clean the inside of their cases. They preserve some level of fouling inside of their case necks. There seems to be a lot of assuming going on here. Test, and believe your targets. Also, consider that stronger measures require more attention to the details. I would not treat CLR like some known quantity bore cleaner when it comes to leaving it in a bore for longer than is necessary to get the job done. I have done quite a bit of research on the ingredients and their effect on steel and have had a friend get very good results for carbon, but he was no fool and used his bore scope to establish how much time and what method worked best.