if it can be done with a PCP it can be done with a springer just takes a little more skill/practice and only use chairgun as a guide its only a computer program and gives the information that was put into it , like a flight simulator no pilot has ever earned his wings on one they give him a good idea what its like but there is no substitute for the real world
get out there try different things you have nothing to loose but when you get it right then you have the satisfaction of knowing you can do it
yes its easier with a .177 PCP but it can and has been done with a .22 springer

best of luck Andy