Try your 231 at 3.1 and see what happens with the HBwc Speer bullet and try a x-light or medium crimp to see
if your weapon likes one over the other.

My snub 38 did better with Bullseye at 2.7grs for groups at ten feet with a x-light or med. Hvy crimp. with a 1.16" oal
with the Speer HBwc.......... never tried the Rem primer.
Good shooting.