Rebs, all my load development is for hunting/varmint rifles and I do have some varmint rifles that I also shoot 100yds just targets.
If I only shot 100yds I develop load at that yardage and I'd take the smallest group if it's repeatable and be done with it.
I don't think I'd be shooting 20 shot group either with one load or even 10 and I'm not saying it's bad.
It might have been helpful had you explain about shooting 100yd only.
VFW Life member
NRA Life Member