Shots Fired: A Machinist Guide

[Ephier]

I don't see why this would be such a big difference? For bards at least,

W/O WM
WD: 11.364

W/ WM
WD: 11.602.

It's only a 0.3 difference. Why would there be a whole 1.6 difference for a Machinist? Makes no sense in my head, unless there's something I'm severely missing and/or forgetting about the Machinist?

Those are not my numbers, they are from the OP's post on the first page (was too lazy to make a quote, hue). My guesses would be ammo adding potency to skills, hot shot, procs, rapid fire and free crit modifier.