New 640 pro cylinder is difficult to open

I've not seen that sort of issue with the rifling before. I'd be willing to bet that it is debris, possibly lead fouling.
 
I've not seen that sort of issue with the rifling before. I'd be willing to bet that it is debris, possibly lead fouling.

That was my initial thought as well, but since it's relatively easy to get to with a pick, I poked at it. It's solid.
 
Back
Top