ok i hope this works.

in the pic the top nock point is clamped down. [cannot move, without nocking pliers] bottom nock point {which is black}[can be moved up and down freely.] it is almost like rubber. my question is, is this pinching the nock? i shoot with a release. when i pull back the rubber goes so thin from the pressure of the release it is dang near paper thin. am i losing speed? it is almost about to fall off from being shot so much so i figure unless there is some advantage to this being there instead of a nonmoving nock[lighter than a regular nocking point that will give more fps.] i will put a solid nock on the bottom of the arrow that cannot move.

please help!!

thanks,
Nick