John, some give cycle times, but I am not aware of any that give cycle times under load.
Loader and 3pt capacities are some of the most misleading numbers given by manufacturers. They are often used ot show their tractor has greater capacity than a competitor but they use non-matching numbers.
For the record, and this has been posted before, the most "honest" of the manufacturers give all the spec numbers in places that are easy for people to access.
Kubota and
Case/New Holland typically provide 3pt capacity at both the pivot point + 24" behind the pivot points. They give loader capacity as several lift heights, and at pivot points and at points forward of the pivot points. Both brands typically do this on the internet and in their brochures.
John Deere provides all the numbers, but makes it pretty darn difficult to find the numbers, and lately has been featuring pivot point numbers, which many feel are inaccurate numbers.
Most of the minor brands provide very misleading numbers, which is a shame, because they occasionally have superior numbers for some of their machines and don't need to hide the capacity.
In the case of the Case/New Holland capacity number that I posted early today, it should be pointed out that I made the mistake of using the Case marketing data and simply reading the description, but not the spec sheet. When I later checked the actual spec sheet I saw my mistake. I simply don't want someone to think that they provided a misleading number, it was clearly my error.
Also, when I do the calculations I generally "round up and add a few" (so that I give the benifit of the doubt). However if I were to measure the Case/New Holland in exactly the way I calculated the Montana specs, then the Case/New Holland would out lift the the Montana by a few pounds. And the spec sheets for the Montanas and the New Hollands do confirm that the Case/New Holland is the stronger loader, which confirm my math technique.