I mis-spoke; I did not intend to imply that the collet FC dies post-size (at least the 7.62 tok FC die I have does not, and all the bottleneck pistol FC dies have similar parts). In reality, there is no need, since the collet is actuated by the shell plate, not the cartridge, so there is no chance of buckling the case. With a straight wall cartridge FC dies, the crimping action is driven by the case, so there is a chance that it could buckle, in which case the carbide sizer ring would iron it back out. I can't imagine that would do the case life expectancy any good, though.
Andy
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