Call it 'zilch mode', 'cause you are pumping current through the cart coil and a RESISTOR to no aparent effect what so ever!
Why even ask, just put a short circuit...
a 10 ohm load will output the same voltage and current from the cartridge period. Of course the situation without the SUT would require 26dB more gain but that isn't what is being discussed.
the only difference between no load / loading the primary situation and loading the secondary is that the current delivered to the load with the resistor on the secondary must also traverse the transformer. The case of the Primary loading resistor and resistive loading of the cartridge without the SUT are identical so if one is "pumping current through the cart coil and a RESISTOR to no aparent effect what so ever!" then so must the other because they are equivalent.
The cart will NEVER (with out a SUT) be able to pull an equivalent current as with an SUT set-up
Maybe this is just a naming thing. First cartridges do not "pull" current, they deliver it. Secondly whether there is a SUT or not has no effect on the amount of current delivered by the cartridge. Yes a SUT will give you voltage gain, but that comes at the cost of the ability to deliver current.
dave