Are you using the 0.4 ohm coil (whatever Q or come other letter they randomly choose to name them) that came with the BB? I have one, and a few things I've noted about it. First, the cotton is pretty well packed in there. You really have to prime well, let it sit, do a bunch of unpowered draws, and then start out really low, like 20W, and slowly work your way up a few watts at a time. I'm not saying your preference for 60W is wrong. We all have our own sweet spot. But I will say at 40W I feel I've maxed out the coil.
On the duo-deca-whatever coil with the BBB comes with at 0.15 ohm, and has ?3 separate parallel coils, I've got it maxed out, for me, at 45W. Could I work it higher? Sure, but that provides too hot a vape for me. Regardless of where I end up, I still follow that same priming slow powered break in of every coil. Not right on topic, but I will say that these Smok coils have a strong cotton taste for the first half a tank, then performs quite well on flavor for me. But I was surprised on that first draw to have such a strong cotton taste.