howdy.............new to this so here go's.....I have come across a winchester model 12 in 12 gauge.I thought it worked perfectly but now not sure.I had taken the shotgun for a sporting clay workout.I put the first shell in the barrel an closed the action all seemed well.I then tried to load the second shell into the magazine tube,but after inserting the shell,i found it would not stay inside the tube(like my 870 wingmaster)but came out halfway under the feedramp.I took the shotgun to a gunsmith but he told me that the shell was not supposed to stay in the feedtube but positon itself under the slide,waiting to be pushed in after ejecting the fired round!?!?!?He told me that afetr putting the first shell into the feed tube which pushes it under the feed ramp,the second shell is feed into the tube after depressing the feedslide down on top of the shell under it,an then it would stick in the feedtube awaiting the second shot an action worked with final shot loaded....what i am saying is ...the second an third shell don't stay in the feedtube like 870 wingmaster ??? winchester model 12 lets the second shot rest under the feed slide????is this correct?????please help whats right here