Charlie Petty wrote:
... although the P-35 was the first high cap.
Well . . . it was the first one that really caught on, and the first I'm aware of that took the entire magazine in the buttstock.
But highcap pistols
did exist commercially before the P-35. Various versions of the Mauser Broomhandle with detachable 20 rd magazines were made by Spanish companies in the 1920s, and Mauser's own
Schnellfeuer came along around 1932. Mag was not concealed within the buttstock, but hung down in front of the trigger guard.
But of course, having full-auto capability, these little gems are now NFA items . . .

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In terms of ammo and bullet design, for rifles the last BIG advance was Nosler's introduction of the Partition around 1948. Some of today's super-premium bullets may outperform the original NP, but they won't do it by a huge margin . . . and they may have problems of their own. (
Don't ask me about X-Bullets!)
After many decades of stagnation, I'd say pistol bullets really began improving when Lee Jurras and Super-Vel came on the scene . . . (though his contribution was probably more to pistol
ammo rather than pistol
bullets) but I've no doubt that today's bullets outperform the original Super-Vels in just about every particular.
Charlie Petty wrote:
I credit Tom Burczynski and Hydra-shok for starting it though.
Was he the guy who came up with the original "Skorpion" .38 Special load, that looked like an inverted HBWC with a post in the middle? Didn't Federal buy him out or something?