I bought a S&W 629-6 5" classic and I was very happy.
Then I find this in barrel.
It indents the lead when the boolit moves over it then let's gas by after it passes. Witch gas cuts The boolit and leads the barrel. Even at 800 fps with wdww pb 250 swc with unique sized .431. At 1000+ gas cutting is worse.
So I returned gun to S&W with the story. They recut the forcing cone and sent it back.
Returned gun a second time with more story plus this picture
And I sent a slug that clearly showed the marks left on it.
S&W returned it today with this letter
Now I have a gun I can't use, as I only want to shoot lead. Now I'm very unhappy