Boxer your right on the necking down, I am just so used to shooting 243AI that I never considered same. I make some slightly oversized mandrels for necking stuff up and back down to form shoulders that accomplishes the same using correct headstamps but does not work brass as much as necking up to next caliber size and back down. They may not be necessary but I like making chit complicated at times. I mostly use them on belted stuff.
