Hi Jim,
I prefer pinned keys with 2 big caveats. I don't like to pin mine right away. I prefer to use them a bit before pinning them to see if they need any tweaking or if changes in humidity require some adjustment before they are locked in place. Fortunately, with a Hawken that has key escutcheons, pins can be hidden behind them and can be removed with the plates unlike keys without plates. The other caveat is that when they are full out, they can be damaged or damage the stock. I always push mine back in after removing the barrel for cleaning to prevent knocking them.
dave