Originally posted by Jerry V Lape:
Here we go again! Only one thing increases recoil and that is greater velocity of the ejecta or the same velocity and much greater ejecta.
Agreed. I probably was not at all clear in what I was getting at. If all things are equal (velolicity ejecta, powder burn rates, etc.) save for a longer cartridge case I am trying to figure out, in that scenario what would possibly cause a significant change in percieved recoil without causing a change in the pressure. I would presume that the greater recoil (percieved) recoil is a result of quicker acceleration of the ejecta (Assume the muzzle velocity is the same, ejecta reaching that muzzle velocity in less time might conceivably result in a "sharper" felt recoil.) I am trying to figure out how the same powder, ejecta, etc. would produce a sharply different acceleration curve in such a way that the pressure was not much affected.
I do not know if this clears up my question or makes it more confused. I simply do not have the proper time to make myself clear. I definitely am aware that actual recoil is determined by velocity and mass. Percieved recoil is a bit different. I am also, of course, aware that you can increase muzzle speed without increasing pressure (e.g. by changing the burn rate) But doing so also changes the rate of acceleration of the ejecta (i.e. it gets down the barrel faster leaving more room for the gas to expand, lowering pressure, etc. etc.) And thus might influence percieved recoil. But this would have nothing to do with short or long chambers would it? (Or maybe it would. That is my question) . Rates of acceleration of ejecta do not change on their own, without something else changing.
