Yes I to look at vol i the case there is much difference in BR100an200 yd verves 1000yd the the thing if works for you that is the most important shoot small
You have to presure up the core seating to not over pressure the core but you have pressure it enough to release the core from the punch hope that helps
but more pressure you place on jacket you I think need to stop before it stretches I see no loss in accuracy let me know what you think you need to mic your dia. as you pressure your jacket the die will only make what the id of the die is.
when you over pressure you core seating the jacket will stretch at the lead line an you make a weak spot in the jacket it will make a shiny spot on the jacket lube does not make any different hope this helps