Life was good last year before I bought a Teslong LED bore inspection tool. Now I liken it as to buying a stroke. 
It showed me many things that I could not see in a bore with the naked eye. Many of these things (according to the reams of YT videos) will rob us of accuracy in our rifles and thus need to be addressed. It was a steep curve at 1st and not without it troubles.
One of the things I did not know about was the dreaded carbon ring that gets baked on in the space between the end of the brass and the start of the rifling. I worked very hard and to no avail trying to rid myself of theses rings bought different magic potions that promised to get them out but in the end they would not for me, come out.
A couple weeks ago I landed a 783 in 308 for my grandson. The plan was to do light loads in it much like you'd get from a 300Savage. 1st thing I did was run the scope down the muzzle. There was copper, lots of carbon and the dreaded carbon ring. I got it all out no problem but that ring just would not come out. For over a week I used everything I had to beat it but to no avail. Then for some reason I struck me to run the scope in from the breech end instead of the muzzle. BINGO, the ring was gone and it was all nice and silver shiny. Seems that when the light goes in from the muzzle, it creates a shadow in this spot that looks like a ring, No carbon, just a shadow that looks like carbon. This is all gone when the scope goes in from the breech end.
The 1st pic is from the muzzle. I included a bit of erosion as landmark to compare to the next pics. Sure likes like a carbon ring to me.
The next pic is the same spot with the scope in from the breech. Bingo, no carbon ring! Note the landmark.
Next pic is another spot from the breech end. Clean as a whistle.
It showed me many things that I could not see in a bore with the naked eye. Many of these things (according to the reams of YT videos) will rob us of accuracy in our rifles and thus need to be addressed. It was a steep curve at 1st and not without it troubles.
One of the things I did not know about was the dreaded carbon ring that gets baked on in the space between the end of the brass and the start of the rifling. I worked very hard and to no avail trying to rid myself of theses rings bought different magic potions that promised to get them out but in the end they would not for me, come out.
A couple weeks ago I landed a 783 in 308 for my grandson. The plan was to do light loads in it much like you'd get from a 300Savage. 1st thing I did was run the scope down the muzzle. There was copper, lots of carbon and the dreaded carbon ring. I got it all out no problem but that ring just would not come out. For over a week I used everything I had to beat it but to no avail. Then for some reason I struck me to run the scope in from the breech end instead of the muzzle. BINGO, the ring was gone and it was all nice and silver shiny. Seems that when the light goes in from the muzzle, it creates a shadow in this spot that looks like a ring, No carbon, just a shadow that looks like carbon. This is all gone when the scope goes in from the breech end.
The 1st pic is from the muzzle. I included a bit of erosion as landmark to compare to the next pics. Sure likes like a carbon ring to me.
The next pic is the same spot with the scope in from the breech. Bingo, no carbon ring! Note the landmark.
Next pic is another spot from the breech end. Clean as a whistle.
