Although I have never seen one of these take-down systems in the flesh, unless the thread had some level of cam effect there is no way that the connection would have been tight even from new. All square threads have some clearance and to make it with zero clearance would make it impossible to turn. If the internal thread is indeed on a slight angle such as with a bayonet, which is what this type of connection is usually called, then it would be tight if pulling up against a shoulder. In that case if the assembly was lightly lubricated and the action dis-assembled/assembled the normal amount that a hunting rifle would be for regular trips then wear would be zero.

Matt.