15 yards is plenty long for me with a 9mm Blackhawk or pretty much any 9mm.I don't have a 9mm revolver and probably never will But,,,,,,, I think your attitude is spot on for your expectations of the cartridge in a hand gun.
9mm never was designed or expected to shoot at distances. (Except maybe some tangent sighted military handgun/carbines and they were not much good at it)
Even the guys shooting the 9mm carbines with scopes and all are getting minute of refrigerator at long distance.
I fired my scoped .30 Carbine Blackhawk to 100 last week, that's the tool for that job , or my .44 SBH Hunter.
I've been carrying pistols for a living most of my adult life, and there's a reason training and qualifications don't go more than 25 yards. Because under stress , shooting 9mm-40-45-.38 handguns at ranges like 50 yards is basically just spray and pray, because usually we don't have a range table and a sandbag available in a gun fight. Also the adrenaline dump and chaos of a gun fight, with lots of moving and shooting....it is hoped that if Police Officers- COs- Security Guards or military personnel are engaged with bad guys past pistol range, that rifles have entered the equation at that point
Also, as a civilian carrying a concealed pistol....I honestly feel that I have no business taking Hail Mary shots at 50-100 yards with small caliber pistols when I should be using that distance to get out of there. Barring some freak mall shooter type scenario