I do not understand: If each round sits "the same" as it waits its turn to be pushed into the chamber, and they all feed properly except for the last round, why/how does taking some of the plastic off make a difference with that last round? When round #7 is at the top, it is sitting on top of round #6 and there is no little step on the end of the rounds. In fact, the end of each round is "rounded down" toward the front.
It seems that if the (lack of) height of the step up at then end of the follower makes the last round stovepipe - why would it not do the same to at least random other rounds in the magazine, since those rounds sit on top of other rounds and not the follower itself?
For me it has always and only been the last round in the magazine.
The more I try to analyze this stupid situation the more confusing it gets.