Is there a fun format for a pistol comp that would be suitable for an outdoor FT/HFT club to put on?

I've heard people mention Pistol HFT, but how does that work and what are the rules etc.?

NEFTA does hold a Pistol league as part of our Winter League shoots, that consists of 10 lollipop style targets from 4 yards to 25 yards.

It gets reasonable support probably about 50-70 people take part.