Originally Posted by OldCoot
Shouldn't be any different than on a tongue trailer. Chains on a tongue trailer are crossed underneath the tongue to catch the tongue preventing it from hitting the pavement and giving it directional stability while still attached to the tow vehicle but having enough slack to activate the emergency brake.
True, but the OP is talking about hooking chains onto the U-bolts that are installed with his gooseneck hitch in the truck bed:
they're hard to see here, but there are 2 chain hooks on either side of the round hole/circle in the middle
With a bumper pull - the chains are dangling and aren't resting against anything.
With this setup - the chains would be laying in the truck bed and giving you more pinch points.
Or so I'm imagining. (about the pinch points - I'm absolutely sure about the B&W u-bolts)