What's competitive? Honestly, very few of us are "competitive" for the division win regardless of what we shoot. I shoot revolvers a fair bit in USPSA and while I would always choose my 8 shot gun at a major match, I spend a fair bit of time shooting my 625 at club matches. If your closest competitor is 10% away from you, it doesn't matter what you shoot.
I do shoot my 625 a fair bit at USPSA club matches, I'm less than 5% down in the overall as compared to my 8 shot minor gun. I would be down a bit more in my division than the overall, but that only matters if there is someone come close enough to me to race with.
I'd love to shoot the 625 in ICORE, but with power factors set the way they are it's really more of a 38 special game. If there was some form of major scoring, say reducing the time down by a half second for Bs & Cs, I'd probably switch to the 625 in Limited 6 division full time.