Guild Wars 2

Explosive Shot fired 30 shots in 26.2 seconds (average). For an attack with a reputed 1/2 cast time, this doesn’t seem right – even with the .6 seconds I clocked it at between pressing 1 and the Skill Use bar reaching completion for an isolated shot, it should only be coming up to 18 seconds.
For 30 shots to take 26.2 seconds, a cast time of .873 seconds would be required – accounting for the extra .1 seen in isolated-shot tests, there’s still .273 seconds extra time per shot.

The Rifle Turret could fire ten shots in 27.1 seconds (counting from first report/muzzleflash to last). Obviously, this cannot be firing every two seconds – 27.1/10 is, of course, 2.71.

The overcharge, on first testing, fired ten shots in ten seconds (due to the Overcharge having a limited duration and uncertainty as to actual beginning time, I judged it more expedient to count shots fired while the overcharge visual effect was visible than to use the stopwatch). The turret proceeded to continue with this anomalous fire rate for the duration of the first test; I picked it up after confirmation of this issue.

Further testing was considerably less baffling/more disappointing (I waited five turret shots before overcharging; this seems to have averted both the overcharge working properly and the continued rate of fire increase) – four shots in the ten seconds of activity, consistently; at best, that’s a 2.5-second fire rate.