What surprises me is that such a benign pull could induce jack stall on a twin hydraulic system aircraft. The 155, which although with a different head design, shares many common hydraulic system componants, can be thrown around with real abandon and no ill effects. There is a servo accumulator for the RHS system, but it is only there incase the system fails and it then assists the LHS system while the pilot regains level flight. Even then, it is only there for extreme manouevering.
Obviously the Dauphin/AS350 Hyd. sys. seems to be underpowered for some maneuvers.
At least AS/EC is doing something about it with the nice looking 155...