While at Bullpup 2015 I met these two cool guys from LDF Research. LDF is the Youtube channel name and not a legitimate company, but regardless, they are starting out on Youtube and one of them, Dean Van Marel even has his own Bullpup design through a company by the name of Jard that he brought along to the shoot, and will be featured in a later Firearm Blog post. However, what they have been mainly doing for their channel is conducting dry ice tests with various firearms, sometimes getting the temperatures down to negative fifty degrees, by packing firearms down with dry ice, in a wooden crate, and then bringing them out and shooting them. They freeze the ammunition inside the magazine as well. These tests are common in military testing procedures, but I haven’t seen many Youtubers go about this, to the extent that these guys are. Interestingly enough, out of the rifles they had, the Mini 14 had the best performance after being frozen. They use a non contact Infrared digital temperature gun to measure the surface temperature of the receiver, stock, magazine.
Be warned, their videos are almost completely unedited, and thus are very long and tedious to watch, including every second of their experiments. However, they do have interesting findings, and I would have wanted to see an AK test as well.