I kind of have a different take on hot barrels, and I'd be one of those who would tell you not to do what I do, and don't over heat them to where you can't grab them. Food for thought it depends on the type, barrel dia, cartridge, out side temp and half a dozen other barrel heating causes. Some rifle's and calibers you can shoot out a barrel in a few hundred rounds if you are not careful. Do what you think is best for you. I won't abuse a rifle , BUT I won't baby it either. I find zero confidence in 3 shot groups or letting the barrel sit for minutes between shots. It's not my style and not the way I test loads and rifles. I will shoot rapid fire shot right after shot 5 to 10 rounds sometimes with different loads to wring out any of a rifles bad habits. I want to see what the groups are doing while fouling the bore, how many rounds it takes for the rifle to settle down after complete copper removal (each rifle and load is different), I want to see what the groups are after bore is fouled, and I want to see if the shots are stringing. One thing about shooting one right after the other is it keeps your outside influences to a minimum in other words sitting ther for an hour things change in the weather, wind direction, temps, etc, whereas shooting groups in a rapid pace pretty much reduces these issues and you get imo a truer perspective of how the rifle shoots and brings out rifle problems that need corrected such as loads, bedding, and any other non consistency, etc. If the rifle is not consistent across the complete spectrum of where I may be hunting it's absolutely of no use to me as I will not have confidence in the rifle, until it's fixed. Once it's dialed in and I'm satisfied it's a good shooter then I will back off to where I only need to shoot to verify. I have rifles I probably haven't changed scope settings in 30 years, because I know what they will do, sometimes I won't even clean them from year to year because they have only been shot a few times, maybe dry brush them and clean out the cob webs, dry climate and not worried about barrel rusting, these are rifles with confidence. I'm for sure not recommending that anyone do what I do If I wear a barrel out that's why they make gunsmiths.