damage in forcing cone

[backpacker336]

Anyone idea what would cause damage in the forcing cone like this? Cylinder lines up nicely, I have a wooden dowel that is the same diameter as the barrel and it slides in and out of the cylinder with no resistance at all.

 

[calmex]

Is that damage, or just lead build-up? Hard to tell, but leading in the forcing cone is actually a "thing". A lot of Model 19 and 66 barrels got leaded up that way and then split when a hi-vel .357 125 gr. JHP got fired through without the lead being cleaned out. Not all K-frame forcing cones split, but a lot did from exactly this cause.

 

[gewehr76]

Nothing wrong with that forcing cone. all 1892's have long throat to swage bullets into the rifling. Looks like some led or wax from led bullets build up