Nosler 77gr. BTHP
24.5 gr. N140
CCI 450 SR Mag primers
LC 5.56 brass
C.O.L. - 2.265" (max length I can reliably use in my mags, still well off the lands)
I'm getting .6 MOA @ 2720 fps (18" bbl), single digit ES's.
Hornady 75gr. BTHP
24.8 gr. RL-15
CCI 450,
LC 5.56
C.O.L. - 2.265"
.5 MOA @ 2760 fps (18" bbl), ES 9