WCM:
I think your Roberts' quote 100% accurate--when limited to the usual service cartridges from .38spl+P up through 9mm/.45ACP/.40S&W. For those cartridges, the recent projectile design developments have been a boon, no doubt. HST pills seem to perform in FBI spec with terrific consistency. When the Kartridge Krayzee Tyme ends, I will buy a bunch up and test for function in my SD pistols that could benefit from HST.
But Roberts' quote is not valid when the projectile velocity dips below or rises above the usual service cartridge velocity envelope. Below .38spl (and in 158gr or weightier std pressure .38spl), HP of any sort is arguably the wrong answer, especially given the FBI penetration standards. And we have decades' worth of data showing that cartridges moving along at higher velocities have always done just peachy with old-tech hollow point technology.
.357mag
Plenty of experience with old school Rem/Fed/Win JHP/SJHP .357mag in 125-158gr weights. Barrier blind, expand like crazy, disrupt the heck out of tissue, yet do not overpenetrate. Latter-day gel tests show what early users saw. Old school 110gr JHP tend to be borderline on penetration and 180gr JHP skew deep. And when I write "old school" I mean JHP that pre-date Hydrashok, Silvertip, etc.
10mm
Like .357mag, but more so with the old school JHP. 10mm cartridges loaded to 10mm velocity does not need HST innovation.
.44mag
Like .357mag & 10mm. I had always thought the reason .44mag was not an ideal SD cartridge was due to overpenetration. Well, not so much in JHP, given the penetration tests I have seen. It is even more disruptive than .357mag & 10mm, but still does not penetrate like crazy. Still has lots of recoil and muzzle blast, though.
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Federal has done a good thing with HST, but HST does not erase all that we have learned over the decades. And I will be surprised if, in the years to come, we see HST in .38/.40/.45/9mm do as much living tissue damage as old school .357mag & 10mm auto JHP. That is TBD, as HST has little track record vs live hairless bipeds and game animals.
And, again, I think Federal keeps 10mm HST loaded at .40S&W levels due to its re-use of the .40S&W design on the front 180gr of the 10mm pill. If you have a 10mm and want to duplicate .40S&W HST performance, Fed has what you want. If you want all that HST can offer, plus more tissue disruption and flatter trajectory, JHP loads that run at true 10mm velocity is the answer.