One issue is that there is one point of contact and your rifle is doing a "balancing act" on your saddle. How stable is your tripod? A cheap tripod is going to have more wobble, every adjustment point on a ball head induces more wobble. High winds will definitely add wobble. Proper fundamentals and tweaks of your great can help. A tripod can be stable and sometimes conditions dictate a tripod shot is made. I don't take shots on an animal unless I'm confident I can put it down ethically. Arabs... I allow an extra .1mil of wobble for them. An inexpensive monopod is invaluable for rough terrain tripod shooting. You can set that thing up directly under your comb and that gun will stay put. I saw a picture of a marine sitting shooting off a tripod with a bunch of triangles drawn on him... that all and well but that position is NOT stable. Trying to train from a position with all of that muscular tension is going to translate into more wobble on glass. If you can keep your wobble around .1 mil I would be happy with that. May sound stupid but a pack worn on your front will eliminate a lot of dead space resulting in more points of contact from a seated position. I digress