A borescope was used to capture all of the in-bore photos in this article. Nothing else compares to a borescope for seeing what's truly going on inside your barrel. Rifling wear, throat heat checks, carbon or copper fouling, and machining markings are all visible in great detail. I'm going to promote borescopes because borelights, which are commonly employed in gun shops to display the condition of the bore, may make a bad barrel look nice. With a borescope, a bore that looks good with a bore light can look much worse.
You don't have to spend the same amount of money as a quality rifle to buy a good borescope. USB borescopes in the $65 to $130 range have recently become very popular, and they produce excellent images. The NTG Rifle Borescope was used to capture all of the borescope photographs is a Lyman device that sends photos to your phone. For the past five years, I've been using a Lyman Borecam, which has proven to be an excellent investment. The Hawkeye Rigid, which starts at $1,445, is the apex of borescopes (gradientlens.com). The cost of a borescope varies based on its length and available accessories. If you enjoy collecting antique guns,A borescope will prevent you from making costly errors.
Last but not least, many of you have heard of the "clean, cold-bore shot," which rarely goes where we want it to. That is completely accurate in my experience; I have witnessed this occurrence firsthand. As a result, before I do any real shooting, I normally fire two or three fouling shots in a clean bore to help it settle in.
Every 100 rounds, I recommend that you clean your bore. This will help to prevent significant fouling build-up, which can be difficult to remove. This will aid in the consistent performance and accuracy of your firearm.