Hi sibaldib
have you any idea what twist the guns are . TWOTWOTHREE said his 223 remington 700 is better with 40gr hornady v-max . My remington 700 tactical 223 with 1-9 twist loves all 55gr if i was you the first i would try are the 50gr privi then try the 55gr privi then try sako 50gr then 55gr sako.
atb to you W.D