Hi there,I've got a 12ga pardner barrel on my classic carbine frame and stock and every 3-4 shot the shell stays stuck in the barrel,then I have to pop it out tru the barrel with a rod... and it really sucks when you meet a school of grouses...what should I do? I think that maybe the ejector slide may be a tight fit and thaths what causing this..should I take it out and file it a bit?? any advice would be great! thanks