I've been using collapse-able trekking poles for a long time, both, summer hiking, spring/fall hunting and winter backcountry snow/splitboarding. They've been especially beneficial portering where I'm often hauling loads in excess of 100lbs. for as much as 20mi. over up and down a couple thousand vertical feet.
Past couple years I've been using poles in replace of shooting sticks. Since I'm carrying them anyway.
I just wrap a Voile ski strap around the shaft, stuff a glove or whatever in the top of the X
to rest the rifle on and it's good to go. Since they are collapse-able I can adjust them to any height I need.