I have similar weight ~ 55-56 lbs @ 29.25 ” draw with Groves 60″ Prestige Magnum ( with over draw) so i shot Bear Magnum 308’s with 110 gr Zwickey eskimo 2 bld on about 40 gr Broadhead adapter (150g total). Since this arrow length and bow weight are the same you just need to get out the old Bear 1976 Catalog & find out what the spine of a 308 compares to…i’d guess it to be ~ 2016 / 2114.
Shooting at gar in 1980 and bowstring broke…cracked limb…it’s a beautiful wall hanger now.
forgot…the arrow length was 28″ with the 308
