Wrong bullet weights, IMO. For competition given you have a quality 1/7 twist don't make much sense not to shoot the bullets best fitted to your rifle barrel.
Why give up wind drift ya don't have to......
Suspect the 77grn SMK will be your best choice in the Krieger and Midway USA sells the BH bluebox 77 for a decent price.
YMMV, but my list is short here: there's BH which you have listed and then there's Federal Gold Medal 77grn SMKs.
Mike
ETA - forgot one, my personal long range AR15 load:
Sierra 77grn. MatchKing
24.0 grns. Accurate 2460, (Hot Load), DO NOT PUSH
loaded into once fired (or new) Remington Brass
Remington 7.5 small rifle benchrest primers
These are loaded mag length - 2.250" + or –
Come-ups for 24" Colt Accurized Rifle (6724) w/ Leupold Vari-X III, 4.5x14 w/ turrets and Mil-Dots
100- zero
200-1 1/2 min
300-3 3/4 min
350-4 min
400-5 1/2 min
450-7 1/2 min
500-9 1/4 min
550-11 1/2 min
600-12 3/4 min
700-17 3/4 min
800-23 min
900- no target
1000-35 1/2 min (34-36 depending on humidity)
This may be of some use to ya.
Mike