The plunger tube is under NO stress during firing, and at no time is it in any way subject to "battering." In fact, when building 1911s I have on more than one occasion subjected the pistol to lengthy sessions of test firing before I finished the frame. When I do that, I just press the plunger tube into position and rely on the left-side grip panel to retain it -- which the left-side grip panel was designed to go. I've never had one come out when used without staking, as long as I use grips that conform to the original design.
And yet, I have seen severals posts from 1911 owners who's plunger tubes have come loose in the gunsmithing areas of 1911 forums.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill?