It's the perfect IPSC Minor Revo. That's why I bought one.
I use the 625 for Major and the 986 for minor.
IPSC is still 6 shot maximum.
I find my scores are almost identical between the two, but the 986 being an L frame and lighter ammo, I can run it faster, so in the end I do slightly better with the 986.
Also, if I have a misfire, I can just run the trigger again for the 7th shot with the 986, where with the 625 I'm into another reload.
I had a 929, but it was heavy and cumbersome compared to my 5" 986 or 5" 625. Also had to run it without the comp or get bumped to Open.
It had no benefits over the 986 in IPSC. Ended up selling it because it was redundant.