I use several different bore solvents depending on the amount of clean and the time i have to do it.
On realy fouled barrels I use Sweets 762 and don't leave it in more than 30 minutes.
For normal cleaning and break in I like Butch's bore shine because it is not as harsh as the Sweets and does a good job in a reasonable time. I still don't leave it in the bore for over 2 to 4 hours.
For long term or over night (When I can leave it over night) I like the Bore Tech Eliminator for that reason without hurting the bore.
After any cleaning, I like to swab the bore with Hoppies #9 to remove any of the stronger solvents followed up buy a light oil for storage.
What ever you use, follow the instructions to the letter.
J E CUSTOM