Allan,
For what its worth, Pindall's Missouri Sharpshooters almost always served as skirmishers for what would later become Burn's brigade of M. M. Parsons' MO Division. At the Battle of Helena, Pindall's unit acted as skirmishers for Parsons' assault on Battery C. In fact, Amos Cake, a member of Pindall's unit, was the first Confederate to enter Battery C.
Bill