For me, mouse tails are just used for extreme problem feeders that will not take a pink (scented / plain / brained / etc) or a thawed lizard. A newly hatched snake can go for a long while on the yolk reserves they are hatched with if they want / need to.
Now I know for some there is a problem with having small pinks on hand, or access to lizards and so on.
Also, the tail of a mouse could not possibly meet long term nutritional needs. One thing about pure predators is that organ meat is needed to get all the trace nutrients (at least that is my personal opinion). But the tail is easy to force feed and will not "blow up" like a soft skinned thawed pinky, just wet it and ease it down the tiny gullet.
My experience is that tails will keep them alive, but they will not put on weight or grow for you until they start taking whole meals.
Lance
-----
___________________________
Herp Conservation Unlimited