At our weekly IPSC practice yesterday, one of our number showed up with his 8 shot .357 S&W, wearing rows of slime green coated bullets on those vertical post ammo carriers.
I chose to shoot one of my snubby M19s with dull, drab LRNFPs, my speedloaders on my left hip as I would for IDPA concealed carry rules, but they wouldn't let me shoot concealed.
Between the two of us, we never placed lower than 4th in five stages against the remaining eight shooters armed with CZ Shadows, Glocks and 1911s. We never experienced a single function whereas the autos, well, you know ......
My fellow revolver shooter credits his neon ammo. Me, I must just be lucky, I guess.
BTW - two auto shooters were using coated bullets, one .45 ACP, one 9mm.