[whippoorwill]

took two of my 1911s to a local 'smith for restaking of the plunger tubes. One had been loose for years, and the other, loose since new. The 'smith had one of those modified vise-grip staking tools, and as he's fixin' to start squeezing, I said something like, "I thought it was necessary to put a drill bit, or something, inside the tube, so it's isn't crushed by . . ." Well, apparently it is necessary to put something inside the tube, because after crimping the drill bit had to come out anyway, to open the crushed plunger tube.

I believe this is the type of scenario to which the OP is referring. I've heard of this as well.