All the years I've been shooting a bow, I never went to a 3D shoot until a friend of mine finally talked me into it just last January.
The few 3D bowshoots I've been to since have had targets anywhere from 4yds out to about 60yds with varing steepness of up/downhill shots.
I'd say close to half or more of the shots have been between roughly 20 - 30yds
2009 Martin Bengal M2 Pro Cam w/factory STS & CCS.....66lbs, 29" DL, 422gr @ 272fps, Winners Choice string/cable, Trophy Taker drop-away Rest, Scott Release
1996 Martin Firecat XRG Pro Series w/Ultra Sonic wheels.....69lbs, 29" DL, 465gr @ 245fps, w/fingers & Martin leather glove