Thanks! Yeah, that's actually the exact one I have, and have been using so far, so I guess I'm not too far off track.All good advice above, I will just add you can get the Lee collet neck size die for cheap and they work really well.
Are you using the Sinclair mandrel? I got 8.5 SD. I was surprised so haven't changed.I anneal and full length size every firing then use a mandrel to precisely open the neck. By using the mandrel it lowered the ES and SD to single digit in my 6.5 creedmoor.
Yes, i'm using the sinclair mandrels and the SD is between 5 and 8 consistently. I too was amazed.Are you using the Sinclair mandrel? I got 8.5 SD. I was surprised so haven't changed.