Plunger too weak can lead as previously mentioned to it bottoming out (compressing so far in that the arrow will hit the housing) "clicker bounce" the actual pressure of the clicker compressing the plunger when the clicker is activated the arrow is propelled away from the button. I've seen buttons backed off so much that the spring has no compression at all and the plunger can rattle in the housing, if you need to reduce the pressure to this extent and can't take measures such as getting stiffer arrows, lowering bow weight, reducing pile weight etc, all you need do is move the housing in a bit and increase the spring tension, you will get a similar launch angle but without the undisirable effects mentioned above. Jay Barrs sets up like McKinney nock high and stiff. (yes I voted in the wrong box read the words in the question but not necessarily
in the right order)