What rifles were you guys shooting, and what is your setup? Bench rest, bipod, rear bag etc?
Once I put a bag rider on my AT-X it really helped clean up the vertical dispersion by letting the bag work.
For example:
https://i.ibb.co/P96p4xx/CAP-A093-DF...1-F44-A4-F.jpg
https://i.ibb.co/q7HvhPN/Ballistic-X...-33-111934.jpg