Thanks, I'll try some AR comp first.I had trouble keeping the ES and SD's low with CFE 223 with most of the match bullets I tried, though I did get good speed. The lone exception was with 69 TMK's. I suspect that experimenting with different primers might have shown better results.
Strangely enough, I had the same problem with 69 SMK's, regarless of the powder I tried. Still scratching my head over that one.
I have found the 68 BTHP, 75 BTHP, and 75 AMAX bullets to be easy to tune for low ES and SD with both IMR 8208XBR and AR-Comp. Both powders also have good reputations for temp stability.