t/c - There has been a bunch of targets shot with a sandbag rest and for the most part with most hunting rifles a good ol' sand bag is quite enough. There was a time when sand bags ruled the Bench Rest world, but that day is long gone and for good reason. If you truly want to test a VERY accurate rifle nothing does it better than one of these rests. In my view they have been much to expensive for what you get, but they are truly great.
I was happy using an old orange Hoppes rest and sand bags for many years. Then another shooting buddy let me shoot his rifle from his rest/sand bag set-up. I sat down behind the gun, made a few quick adjustments, the gun was as solid as a rock, I settled in for the shot and took it. The gun recoiled as you would expect, but what startled me was, resetting the rifle back into position on the stops it tracked right back on target, not just close but ON TARGET its odd to get excited about this but whow that was neat.
Then consider the interest in long range shooting on PD's, the various ground squirrels in the west and woodchucks in the east, combined with the new breeds of highly accurate factory rifles these rests really shine. They are very versital with the incredable level of adjustment available in these rests. No more fidgeting around to get a shot picture, no more make shift shooting positions. Simply turn to the target, crank in the needed adjustments, lock it down and have at it.