Thanks to all for the heads up, my brass being new, won't have some of the problems stated for already shot or range brass. Plus the effort for using a couple of these to try and gain some 6MM ARC brass far outweighs the loss of same. I'll report back tomorrow on what takes place.
No need to wait. The main problem with converting 762x39 brass directly to 6MM ARC brass is the sloping shoulder of the 39 brass so that it does not get pushed back to properly allow it to go into battery. So if used it will still need to be a two step process. At this time, with powder and primers being in such short supply I'll just use the 39 brass for my 762x39 AR
No need to wait. The main problem with converting 762x39 brass directly to 6MM ARC brass is the sloping shoulder of the 39 brass so that it does not get pushed back to properly allow it to go into battery. So if used it will still need to be a two step process. At this time, with powder and primers being in such short supply I'll just use the 39 brass for my 762x39 AR
A wild flower growing up thru the cracks in the sidewalk. - Problem child