Originally Posted by
Bruno27
Agree Mick. As you cock the rifle, most of the load is taken by the rear bearing surface. I consider the load at the front of the piston to be negligible during cocking, the seal being able to take this load and as you fire the gun, the only force is on the axis of the piston (if you ignore moment on this axis induced by the spring). I have modified the piston of my Diana 35 (old) with no front bearing and it works fine.
Less friction = more power and more consistency
Cheers, Bruno