OK, I'm not sure exactly how to describe this, but I'm having a problem with my Browning Hi Power. I recently put in a new Olympic Arms barrel, and it's a pretty tight fit, but the action works fine when it's clean.
The load I'm using is a Lee 124gr TC boolit (water-dropped WW) over 5.4 gr Blue Dot with OAL 1.04.
It cycles fine, shoots great, clocks at 1060 fps. There's some leading, but it doesn't seem to get any worse and doesn't affect accuracy, even after a couple hundred rounds.
But, occassionaly I get a flake or two (like small oatmeal flakes) of lead blowing back out the ejector port, and a couple of times it has fouled up the action so the slide doesn't fully return. If I lock back the slide and wipe out the fouling on the underside of the top of the slide in front of the firing pin assembly, I'm back in action.
My main question is why I'm getting the lead flakes blowing back. Is this at all common or have I got something weird going on?