I have a RRA upper with a 1:8 twist 18" varmint barrel. (I shoot a good bit of this 55gr stuff).
This ammo rarely goes on significant sale... even more so for the Hornady Custom either 75 gr or 40 gr. Funny thing, everyone seems to be in the $30/50 rounds ballpark. Long way from $4 - 5 dollars / 20. Bottom line, it is good mid range ammo.