Does anyone use a mandrel die or adjust their collet die so that the case neck is maybe 2 thou undersize? ex. 222 or a 223 mandrel for a 224 case?
You can chuck your mandrel in a drill and remove a small amount, maybe .001” or less, with sandpaper or Emory cloth.
You sure can. I just wondered if anyone resizes a fired case just enough to have the finished neck a couple of thou under the bullet size. Say, .222 for a 224 case or .306 for a 308.
Doing the above rather than using a typical sizing die which sizes the neck down too much and then expanding out to its finished size with an expander ball.
Usually, after the expander ball is pulled through, the case neck is often still too small in diameter. This can make bullet seating more of an effort
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