Reserve Shooter or Shotgun for Gas Jockey Pyro?

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So yeah, like the title asks, which shotgun do you prefer with the Gas Jockey set?

I'm having some trouble deciding between the two. I like the Reserve Shooter because it gives me the ability to do some burst damage with the loss of the Axtinguisher, but I find that I empty the clip quite frequently and spend a lot of time reloading.