Tusk has a fire rate of roughly one round per second. However, it can charge up between shots, which takes about a second, meaning it can maintain maximum fire rate with maximum accuracy. This is very odd to me, because this goes against the entire concept of these weapons. Fowler and Tusk seem to be designed in a way that makes you choose between charged shots (slow and precise) or uncharged shots (rapid and inaccurate). If you can have the accurate shots with the rapid fire rate, the charge mechanic becomes redundant. If you were to remove the charge mechanic and keep the fire rate as is, Tusk would perform exactly the same.
I suggest giving players the option to utilize uncharged shots. Remove the ability to charge between shots, but increase the fire rate. Make players choose between accuracy or fire rate. Right now you can have both and that's not how these weapons should work.