This is a perfect case of too little experience with a bore scope. You can see the ringing from the gun drill or the bore reamer. That fucker is CLEAN. You can also see that the edges of the lands are flaked off pretty bad. If You can see that level of detail then the barrel is clean. I can also tell that it is not a hand lapped barrel. It looks like a shit button rifled barrel. When barrels have that many defects they tend to shoot better a little dirty.
This is exactly the reason we invest in top quality barrels. Consistency of bore and groove size and internal finish consistency make a big difference in how they shoot AND clean. A good barrel in the sweet spot of its life will shoot to point of aim with at most 5 rounds of fouling. In my experience it is more like 1 round. After 5 rounds the velocity will settle in. If you have a barrel that won't shoot without a lot of fouling, it is likely towards the end of its life or a rough factory barrel.
I also don't ever try to dissolve copper fouling with solvent. I clean with abrasives every 200-400 rounds. The abrasives will remove the copper from the tops of the lands and grooves while leaving the firecracking and other flaws mostly filled in with fouling. This method has helped me to achieve longer barrel life than typically stated as well as good accuracy and consistency.
As an aside, even good quality barrels sometimes have voids in the steel and some defects that make ugly spots in the bore. I have seen this in many barrels. If they shoot there is nothing to worry about. The best use of a borescope is to know if your barrel is clean. According to the photos you posted, that gun is ready for another range trip.
This is exactly the reason we invest in top quality barrels. Consistency of bore and groove size and internal finish consistency make a big difference in how they shoot AND clean. A good barrel in the sweet spot of its life will shoot to point of aim with at most 5 rounds of fouling. In my experience it is more like 1 round. After 5 rounds the velocity will settle in. If you have a barrel that won't shoot without a lot of fouling, it is likely towards the end of its life or a rough factory barrel.
I also don't ever try to dissolve copper fouling with solvent. I clean with abrasives every 200-400 rounds. The abrasives will remove the copper from the tops of the lands and grooves while leaving the firecracking and other flaws mostly filled in with fouling. This method has helped me to achieve longer barrel life than typically stated as well as good accuracy and consistency.
As an aside, even good quality barrels sometimes have voids in the steel and some defects that make ugly spots in the bore. I have seen this in many barrels. If they shoot there is nothing to worry about. The best use of a borescope is to know if your barrel is clean. According to the photos you posted, that gun is ready for another range trip.
