goosenecks generally work better for rigs that have to go offroading (horse trailers etc.) because they can swivel in any direction,where RV type 5th wheels are more "locked" together and can't articulate over rough ground as well. As a result,5th wheels aren't as likely to sway suddenly and empty all the cupboards as an RV with a gooseneck might,since the truck will have a lot of influence over the sideways motion of the trailer. I set the 5th wheel plate on my '57 about 4 inches forward of the rear axle centerline,and it worked great.
Speed
