I'm on a roll! I've had some success in draining those low fill bottles. It's a bittersweet success though as some of these selections are not in production any more and chances are, I won't find more.
A 1978 Benchmark gave up its last the other night. One of tastiest and smoothest dusty bourbons I have is the Benchmark. This particular bottle was non-age stated (NAS) and came in at 86 proof although I suspect it was older than 4 years just by the depth of flavor and long finish. Whenever I drink this bourbon, I think of velvet.
Second dead bottle was a Single Malt Irish, Michael Collins coming in at 10 years old and 80 proof. This particular Irish has nice transitions for a low proof. Fruit, spice and sugar coated nuts. A very pleasant whiskey.
So now I'm on to other selections on the list. The BTAC stuff is going to take some time as I don't hit those that often; not sure why, but I don't. My tastes have changed over time and I'm less inclined to hit the big barrel proof bruisers.