I'd like to see someone with an auto-sear do a burn-down and see how well it fares.
I don't have anything bigger than .22 LR that's blowback operated, except my carbine conversion unit, and it feels a couple pounds heavier than it should be. A blowback pistol in .40 S&W, .45 ACP or 10mm has to be a top-heavy, awkward gun. The 10mm is over 3 pounds and the majority of that's going to be reciprocating mass of the slide. But, like I keep hearing, as heavy and butt-ugly as Hi-Points are, they work.