I keep hearing PRS competitors discuss needing a rear rifle tripod for some of the PRS stations. I went to one PRS contest but I didn't see any stations needing a rear rifle tripod. Can someone elaborate on the need to have a rear rifle tripod for PRS contests? And are these tripods essentially the same type of tripod that you might use for a regular, standing spotting scope or rifle...but not fully extended to standing height or specialized shorter tripods? I apologize in advance for this very simple set of questions...but I can't find my answer searching on the Internet.