40 grains and duality
When introduced, the concept of handgun and carbine chambered the same made some sense. Living on the frontier, remote, perhaps from a saddle bag, with a limited distribution network dual chamberings made life a bit simpler. I suppose most all of us know that. I suspect that the .44 WCF popularity back in the day was that very reason.
Just today watched an interesting video, a 'Tuber shot 44-40 and .45 Colt from a 4-5/8" revolver, both loaded with 40 grains of black powder. The .44/205 had higher velocity over the .45/255, foot pound numbers were a near match. the .45 only 10 lbs higher. Regrettably he used 2F, but such is the case.
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A bit of Winchester lore I only recently learned is that the '66 Winchester was chambered in the .44 Henry or .44 rimfire. Apparently there was a centerfire version of the stubby .44 available at the end of production. Before you flame me, that is from a single internet search and I sure could be mistaken. But.....I never realized the '66 fired the same cartridge as the Henry. Always thought they were .44-40/.44WCF. So surprise, .....the '66 was relatively mild ballistically speaking, not anymore gun than the Henry rifle. Didn't know that 'till just a few days ago.
A bit off-track, but I no longer match my (.357) carbine and revolver loads. What I observed was that for one thing, I rarely carried both at the same time. My DA defense loads were factory 125 JHP. My SA utility load was a 158 LSWC at a modest 1000 fps. The carbine load was an all up 158 JHP for whitetails. None of the guns shot their respective loads to a common POA/POI well enough to suit interchangeability. (oddly, mag 125 JHP and .38/148 wadcutter DID from N-frame 'Smith...go figure) If I made a sight adjustment to gain duality, eventually, I would find myself wanting to plink with light loads, or hunt with heavy loads, and one of the guns would not be appropriately zeroed. Pain in the neck. Historically,with one bullet style and weight offered, the old timers didn't face such issues.