I live on the coast. its always 90% humidity in the summer, and temps in the 90's are regular. I doubt the sabots would hold a temp for long. they are so thin, they would probably loose their cool by the time they were ready to be loaded. or even if kept in a cooler, would probably be heated by the time they were seated in a warm barrel. Guys have been using aluminum, or brass rods in a cooler, or a homemade PVC pipe tube wrapped with foam insulation. the rod has to be very close to the bore diameter. or it doesnt work nearly as well. wipe the rod dry out of the cooler, shove it down the barrel and in 30-60 seconds the barrel is cooled. a swab or 2, reload and go. I really dont shoot much in the summer either. My Scandinavian blood dont take to summer temps well. I become a human sprinkler system. I couldnt keep things dry . Maybe an hour or 2 just at sunrise once in a while could be had, but my focus is mostly on fishing for the warm months.