I use the same hackamore that you have on my jumper mare. For your question about the tighter rein its all about staying out of your horse's face. In a hackamore you can't ask for a head set and you can't be to demanding.
I recently started using it as my horse use to shake her head and pull but now when she tries to do that she stops immediatly. I love it she turns stops and goes in it without a problem.
I just slid the nose band off and that was it.
Hope this helps!! I love hackamores on my mare!!!!