Yeah, handshock is a funny thing. My first Longbow was a Martin Stick. Shot that a number of years, and the whole time I was like, "Handshock? What is this handshock that everyone talks about?" Never noticed anything or gave it any more thought. Then I got a Bill Price R/D longbow. Very nice. And a few after that I got a Bob Lee Bicentennial Elite R/D longbow. Sweet.
So one day, for whatever reason I picked up the Old Martin and its arrows and shot it. Holy Cow! It felt like I had just fired a large caliber hand gun!
Nothing had changed except my perception of (and tolerance for) handshock. Basically those nice R/D bows had spoiled me.
So no, there can be no truly zero handshock bow, but each shooter is different, and a shooter's perceptions may even change over time.