Ah yeah, that isn't optimal. I fixed it so it turns off when Ricochet + Gauss Round has been used, which results in higher potency.

The barrel was only toggled on every 90 seconds, using it with Raging Strikes + Hawk's Eye + Blood for Blood + Wildfire + Rapid Fire.

I tried running the simulation with a 30 second delay on those skills so bringing the CD of Hawk's Eye + Blood for Blood + Wildfire + Rapid Fire to 120s to line up with Hypercharge, and the results are:

w/ 90s on Hawk's Eye + Blood for Blood + Wildfire + Rapid Fire
The total potency was: 22739425.6275 over 270 seconds.

w/ 120s on Hawk's Eye + Blood for Blood + Wildfire + Rapid Fire so you can line it up with Hypercharge
The total potency was: 22235026.6965 over 270 seconds.

So it's not worth waiting the extra 30s to line up the CDs with Hypercharge.