and of course the cse floats in the shellholder, quite a bit actually. I measured it once on one of these discussions. Best I can remember it was .003 - .005 on the Y axis and .010 on the X axis or something close to that.
Regardless, when the case is inserted in a full length die there is no wiggle room anywhere. The dies are cut with one piece reamers so at the point in time when case is at top dead center in the die the neck is as parallel to the case body as it is going to get. It may or may not be concentric with the bit of the case web that is outside the die and it may or may not be perpendicular to the case head but it will be concentric with the case body that is inserted into the die. If that neck gets bent it gets bent when the case is being withdrawn from the die and the neck and case body are no longer supported by the walls of the die
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“How do I get to the next level?” Well, you get to the next level by being the first one on the range and the last one to leave.” – Jerry Miculek
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