I think bullet drop and accuracy are going to have to come into the decision somewhere.
I own a 357 and have been trying to decide if I should use it for 200 yd sillywet or upgrade to something else.
Ballistically the 30-30 is better than any pistol caliber at 200 yds.
A Hornady 170 gr .308 fp, BC 189 will stay supersonic at 200 yds from 1670fps at the muzzle,
A Hornady 158 gr .357 hp, BC 210 will stay supersonic at 200 yds from 1610fps
A Hornady 240 gr .430 hp, BC 205 yada yada, 1620 fps
A Hornady 250 gr .452 hp, BC 146 yada yada, 1880 fps
So the pistol calibers have to be pushed harder to make it but the 30-30 is only shooting light loads to do the job.
For those of us who can't afford to shoot large quantities of jacketed bullets or the club won't allow them, the numbers when using Lee moulds BC figures make the pistol calibers look a lot worse.