i didn't understand that article. is the point you gotta have a custom gun to make 32acp accurate?
No
But some of the ammo out there is smaller diameter, and that is going to be less accurate.
I think the key to shooting 32 ACP accurately out of a 327 Federal Magnum revolver is to find 32 ACP that has the largest bullet diameter.
I think you research the bullets, get the fattest one you can and see how it works.
Some 32 ACP bulls eye shooters years ago were experimenting with lead bullets as big as .313 - doing their own loading. Some of them like the Hornady factory XTP 60 grain, and I've seen targets where they've put 10 rounds inside the X ring at 50 yards (with a Pardini )
* I'm not advocating that anyone try to shoot .313" bullets through their .32 semi-auto, especially not jacketed ammo, I'm just relating what some competitors were doing in the past (with lead).