Not dry hits....but the vape was starting to taste a little burnt. I swapped out the coil for the spare 0.15 ohm coil. When I looked at the coil, I saw that the center was positively gunked black. I think it didn't help that I was vaping it at 500 degrees. I took the coil apart and the wire was black with caramelized juice. The coil itself came apart pretty easily, and I had a package of pre-wound nickel coils from Fasttech, so I wrapped it with Japanese organic cotton and put in a new vertical coil in it (albeit it is a single coil now, not dual vertical coil). Threw it on the ohm meter and it measured out to be 0.14 ohms. Perfect. I'll have to try it at some point to see whether I have enough cotton wrapped around it. It's not packed super tight so hopefully it won't leak.
As an aside, I noticed that although the coil itself has 4 large wick holes in the barrel of the coil, the metal shield inside the coil blocks 2 entire wick holes plus 1/2 each of the remaining 2 wick holes. I've also changed my temp to 480 instead, so hopefully the coils won't gunk up as quickly.
The coil wire that is in there is now 26 gauge, 12 wraps and the center diameter looks to be a bit smaller than the stock coil.