Quiet, I understand that there may be a possible scenario where you might have no choice but to shoot a threat at 100 yards, but any logical person in the litigation field will chew you and your department a new one if you engage a threat at 100 yards with a pistol, period. Your department should really take into consideration that aspect taught to police recruits. My department would NEVER, repeat NEVER teach any officer or recruit ANY pistol shooting at any distance past 50 yards. Things like that are reserved for patrol rifle and shotgun courses. For competition and leisure purposes, sure, shooting at those distances are fine, but for self defense and preservation of life, the shooting of non-competition/race gun pistols at those extreme distances is poor judgement.
As for me, the furthest distance I've attempted to shoot at with a pistol is 50 yards. I didn't really do that great of a job, because I was using stock sights. Anything past 50 yards and I need something bigger to reach out and touch em.