What size bipod are guys using for hunts?

[CBS]

I've been shooting a 6-9 for the bench, 6-9 or 9-13 for prairie dogs, or a 13-25 hunting coyotes. For these situations I know exactly what I need but hunting big game puts you in a lot of different terrain. What height do guys use for big game hunting?

 

[Greyfox]

I use the 9-13 Harris, and an Atlas with the 3" leg extensions which makes it about the same height as the Hartis. I also carry a telescoping shooting stick(two legged) for sitting or standing.