I believe the problem is the ammo,,,
I had not experienced any type of leading problems,,,
That's shooting Federal Bulk, CCI MiniMags, and CCI Blazers.
Then one day back in the last ammo shortage,,,
All I could find was 4 boxes of Remington Thunderbolt,,,
After 2 boxes the forcing cone of my Model 18 was severely leaded.
When I got home I pushed a lead tube over an inch long out of the barrel.
I shot the remaining rounds out of my H&R Sportster,,,
It took forever to get all of the deposited lead out.
It seems to me that Thunderbolt is made using very soft lead.
Caje: The coward dies a thousand times, the brave only once.
Kirby: That's about all it takes, ain't it?
Combat: "A Silent Cry"
Aarond is good,,, Aarond is wise,,, Always trust Aarond! (most of the time)