Ive been using The Seating Die since its release. Ive loaded lots of 308win, 6BR and now 22BR. Just recently loaded 22BR this week and my TIR was right at .001 with a few at .002 on unfired in my gun brass.... Thats damn good for brass that hasnt been fireformed. I say unfired in my gun, because its 4x 6BR that I converted/neck down to 22BR so its virgin to my new 22BR. Loaded 100rd with 88ELD on this brass and runout was spectacular. So I wont by the it wont seat 22 bullets... Cause I have no issues with 88 ELD. We will see today when I seat 90smk in this now fired 22BR brass. As mentioned above, are you you using the correct small stem?
Also, is this fired brass, or virgin brass.? As Forster told me many years ago, dont ever measure runout on virgin brass. Its ALWAYS going to be all over the place (some brands better than others) until its been fired in your chamber. I found this out measuring runout on some new Lapua with my Forster Ultra Micrometer. They told me to kindly fire those loaded rounds, size then load them up and measure runout again... Sure enough, runout was right in spec on 1x brass.
So the next question is, to narrow down the problem/cause.... are you measuring runout on each piece of brass on outside of case neck, inside of case neck, then after you seated to identify the issue??? Just switching dies isnt telling us where the problem/cause is.
But if this is virgin brass, Id go fire it, size it, measure runout on inside and outside of neck then load that piece, then measure runout on that loaded round... Rince and repeat. Does runout you found on neck translate to runout on loaded round??? Or did The Seating Die actually induce more runout??
These are the measurements and tests Id have ran before screaming to the hills. Just switching dies doesnt tell me much when it comes to numbers and whats inducing runout (if any runout is actually being induced at all)....