I rack the slide by grasping the top and pulling back while pushing the gun forward. I do this for the same reasons TWR expressed.
To me the slingshot method means pinching the back of the slide and pulling back (like a slingshot).
There are even rear slide attachments that can be added if you are into this retarded style of slide operation.
I seldom if ever use the slide release lever.
Shooting with my wife last weekend she kept trying to use the slide release on her Shield to no avail. I reminded her of the overhand rack as she had been trained. It was like a light went on.
