Hello
Has anyone tried this, and does it work ? I was told that the GAMO lead BB's are EXACTLY .177 (4.5mm) and steel BB's are actually 4.4mm so there's a chance of jams.

I general I don't like BB's as they bounce all over the place often in a dangerous and unpredictable manner.
It just seemed like a BB which would deform on impact was the obvious solution.