KeS,
You bed it with the tape holding the tang and barrel off the stock enough to free float it all. The bedding takes up all the room between the action and the stock around the stock screws.

When you bed it, you don't tighten down the action with a lot of torque, you use rubber bands or tape to keep it from shifting, but not stress the action.

That way, when you are all done and the bedding compound is dry and hard, you torque the action into the stock and the action fits perfectly like a glove, while the tang and barrel are fully free floated.

Yes, there will be a gap underneath the tang, but it is hardly noticable. Plus, everyone will be gawking at your targets , not staring at your tang asking why it does not touch the stock.

I hope that makes sense and answers your questions.
All the best,