Originally Posted by crackedcornish
but he also said "The action screw screws into the action but rather than stopping it just spins"
that sounds like stripped threads to me
IF the receiver threads are stripped, it would be prudent to strip the receiver, secure properly in a vise and drill to next size larger threads...1/4"x 20...AND make a 'pillar' mount bushing to install in the stock to ensure a FIRM bottoming of the take down screw.
it's more time consuming than difficult and can be accomplished with most garage workshop tools.