drillmaster (dril'mas'ter) n. 1-an instructor in military drill, especially in close-order drill. 
2-a person who teaches by drilling and strict discipline.¹

Rob Leatham's DrillMaster Shooting Club™ n. 1-an on-line membership club designed to improve members' pistol shooting skills via Rob's suggested monthly drills.  Members may shoot the drills repeatedly, within multiple categories of equipment, and enter their top scores into the DrillMaster Shooting Club™ (DMSC) Score Database.  Scores of all the drills are accessible for the members to compare against other shooters worldwide (and Rob)!  Members may print the drills, which include a drill description and score sheet, and use them as a practice foundation and an historical record of their shooting improvement.