It is staying up because he is holding the turtle up to show you the knock down target while taking the picture. The turtle body falls with the target when tripped. Come on guys.
Check to make sure the small delrin discs that hold the liner in place have not moved down the liner during shooting and are allowing the end of the liner to whip around too much and affect points of impact.
Can you try it without the felt or plastic extra baffle inside the different sections. Curious if the added volume helps. I pulled the felt from mine and it seems to work well, I just don't have a sensor to measure.
They can build an AR looking rifle and pose it with operator looking models but can't get the little derlin discs that keep the liner spaced in the shroud from sliding down the liner while shooting.
Gotta pay for that higher minimum wage the person gets who takes an item off the shelf and puts it in a box with packing material then tapes it shut. Sorry guys everything costs more now.