i'd call that a static load though. and a low duty cycle load at that.
Ie.. temp lifting or dragging by the bumper, vs a 'forever' weight hanging on it.
i know when i strap tie my 850 to my trailer I can actually make the bumper deflect downwards due to lever action on the front tounge.
again.. I have loaders on most of mine.. so have no shortage of front weight. my non loader units have chains usually wrapped around the bumper.. probably in the 100# range. i do know I have stood many times on my bumpers to reach things.
may be a good subject f a stress test for someone with a damaged oe bumper.. one that has no collector value.
laod it statically and then make that a dynamic load and drop the frotn tire into a bunch of gopher holes :) I bet the spindles sure wouldn't like it though.. ;)
i'm not arguing with ya either way.. just guestimating.. I've never put it to a test.