When i was building stocks and doing a LOT of bedding, i tried about everything. My experience has been that very FEW rifles shoot better with the bbl bedded full length. None of mine are that way, and personally i wouldn't bother with it.

It is true, that some bbls like a bit of pressure on the bottom, at the forend tip. And, some heavier bbls like the first 2" of the bbl bedded on the action end (mostly on the bottom) with the rest of the bbl free floated. Most just plain shoot best free floated full length.

Drilling Man