Swampman - your name wouldn't be 'Larry' would it?
As to having to 'TURN BRASS' when necking from 308 to 260, I have done it and used the on occasion w/o any ill effect, both from Federal 7/08 and Fed 308 Brass, although it cleans up the 'slop' in a factory Saami chamber - it only helps accuracy.
FWIW, my Sako 75 sporter put the first 2 shots in the SAME HOLE at 200 yards of a 3 shot group, BACK TO BACK using the above brass without ANY neck turning.
