Quote Originally Posted by air-tech View Post
Wonder whether the only variable is speed of cocking, or whether as a part of this, comes speed of shooting (after cocking).

Purely hypothesising here, any cocking action will increase the temp of the gas (hence pressure) in the ram. This heat will eventually dissipate. So if from *start* of cock to pulling the trigger, one takes 15 seconds as opposed to 45 seconds, then there could be an explanation there.

Similarly, with a slow cock, while the rise in heat energy (not necessarily rise in temperature of the gas... as will be made clear) will be identical as with a fast cock, during the slow cocking cycle heat has time to be dissipated to a larger surface area of the (un/partially compressed) gas ram cylinder, whereas with a fast cock there is barely any time and the heat must mostly be dissipated at the end of the cocking stroke, over the shorter length of the cylinder where the compressed gas now resides, so ultimately the temperature here will be higher and stay so for longer.

But if one were to let the gun cool down for a length of time that eliminates all this - say, 10 minutes - so the ram gas temps are near identical - do we see the same variable results? If not, mystery solved.
Possible I suppose. For each shot I put in a pellet, cocked and shot straight after cocking so there should be little inconsistency between cocking and shooting. Slow cock was in excess of 20s each time and probably about 3 or 4s between cocking and firing.