semi shotgun hangs up

[skeeter@ccia.com]

I can't go into what make/model etc on this 12g shotgun a friend has but with about every 3 rounds it will hang on him. This is what I found in the field. Holding upside down, the feeder ramp is on a spring however it takes finger pressure to move it up then about 1/2 way, the spring takes over and will work on it's own. This as I looked while a round was jammed was the reason the front of shell was never aimed into the chamber jamming it. This guy went to the Pittsburgh gunsmith school for a while but need of a job made him quit but he insists that feeder ramp should work that way. I showed him where it was scratching on the one side and that is where it was holding it from the spring letting it flip the round up to chamber. He says it needs to be tight on that side to work the bolt. I said then why did they put a spring in there to let the ramp flip the round up nose first? I think if he would work a little more clearance on that side as already on the other side of the ramp, the spring will work as intended. When a round enters, spring of the ramp will flip nose first toward chamber then the bolt will push on in. Who is correct? Should you need finger pressure to move the ramp or should it work free with spring tension? It does lock where needed until you fire the shotgun work the bolt, ramp hangs up...I say need free float with spring tension.. Gunsmiths out there,....correct me if I am wrong. thanks in advance.