It's been a long time since I worked for Nebraska ASA, but when I did, they had maybe the best set of run-ahead rules I've worked for JO play (this included state championship play):
- 12 ahead after 3
- 10 ahead after 4
- 8 ahead after 5
Men's FP was 8 after 5 only. I can't comment on the SP rules. I haven't worked very many tournaments with a setup like that since 2005. It worked very well for keeping a tournament on time instead of dragging blowouts into the 4th or 5th innings.
Most of the ball I work is either under NCAA codes (8 after 5) or Arizona HS rules (15 after 4; 10 after 5).