Thanks to all.
Trim with Dillon, CCI sr, Win brass 91.3 +-.7 weighted hulls, flush primers seated, 69 out as far as magazine will allow, runout +-.0005 (incredible).
I haven't tried another scope. I was concerned more about weight of barre/upper being too flexible.
I have a lot of H4895 and IMR 8208 and a lot of 69 smk and hornady 52 gr match. I could try the lighter bullet?