Yep, that gun. That was the prelude to the Empire Sniper.
I know what you mean, I have CCM guns too, but you're seriously suggesting you feel the gun's hammer cocking when you are playing and use that to determine when to push the pump forwards?
In my 20+ years of playing with pump guns I can't say I have ever done that. I pull the pump back until it stops, then push it forward until it stops. I don't think there's ever been an occasion when I would intentionally have done anything else.
As long as you hit both ends of the stroke then the gun will load and fire a ball just fine, doesn't it? If you'd stopped the stroke before the point a ball is loaded then no version of the gun would have loaded and fired a ball would it?