Wood chips are ... Like when barrel ageing beer you want a few things to potentially happen.
- The flavour of whatever was in the barrel infuses into the beer.
- The beer interacts with the wood.
- The beer interacts with oxygen.
- The beer interacts with any organisms resident within the wood.
- The beer spends some time maturing.
Chips pretty much give the interaction with the wood only.
If you like that sort of flavour then great, but it isn't the same as a bourbon barrel aged product.
I find that they taste too much like wood tannins.
I've used chips (less is more, contact time matters, they give flavour readily, time helps break that flavour down somewhat, the main one is tannin).
I've used barrel chunks wet with cask strength spirits (lovely, the larger chunks limit the amount of wood character in proportion to the spirit contribution).
I've used barrels which is the full interaction with oxygen, potential organisms and so on.
In true barrel ageing in large barrels the relative volumes mean they don't get too 'woody'. They are much more forgiving and the contribution is more nuanced and influenced by oxygen, the natural ageing of the beer used and what was once in the barrel. I'm excited to fill this one next week!