Everything is a compromise. If your gun groups short colt and you are good with the pressure of your load, go for it and reap the slight benefit over long colt. If you are not so fortunate with your gun, or, would like a little cushion on the pressure, do what many did in the early years of ICORE 8 shot and go with long colt.
My hand/reloading speed did not notice the difference between long and short colt. I just pocketed the easier ejection with long colt and called it good