I’m just starting 88 development but have yet to find a load as accurate as my 80s.With a 7 twist I’d skip the 77s
shoot a 85.5 Berger an 88 ELD or the 90 VLD/SMK
Not mention the throating needs and case capacity aspects of 88s. Long story short— most folks will find 80s can shoot inside 88s unless special steps are taken.