I looked back and I shot this challenge on September 30th which here in Oklahoma is usually mild temps. We do shoot steel in the hot summer temps that reach 100+ and 20 shots back to back are not out of the question. Yes it can and is done. Shooting back to back even in the heat, let's you know what your gun will do. If it strings off target, you need to fix it.
As for burning throats, I tried to burn one while fire forming a 243AI barrel in the summer. Formed 100 cases back to back then worked up a load with it and shot it for almost 2 years before finally sending the gun off for a new barrel and it would still shoot 5 shots under an inch. Barrels are cheap!
