Never, this time of year. I do rarely in the spring and autumn. Sometimes i rig up a bench, and give it a go. Kinda fun to shoot from something really stable. However, i suspect my large groups are more a function of my ability, than a poor shooting bench. One thing i have learned, because i forget to insert a primer now and again, is i don't flinch much.

Years ago, when i had access to a range, we shot from concrete benches, now that was fun. One can really learn about one's rifles. I had rifles that were inaccurate, rifles that were accurate, and rifles that were super accurate. It's a real kick to shoot 1 1/2"" groups at 290 yard, which is what our 300 yard target stand turned out to be. To escape the wind, i would drive up to the 300 yard target with head lights, attach the target, go back to the bench, and shoot before dawn. This behavior required i trade my spotting scope for a much better one.