Originally Posted by
Seaspriter
This is technically very correct -- the round was based on the .32 Winchester. But the reality was this was considered a very underpowered rifle round and never caught on -- too little power.
In reality, the .30 carbine cartridge was really an extra-long .32 ACP cylindrical pistol round. At the time of 1940, a true "rifle" round would be considered akin to a the common full-bodied .30-06 or .303. To illustrate, take one .30-06 (or .303) cartridge in one hand and two .30 carbine cartridges in the other hand -- they weigh just about the same (about 25 grams).
At the time of early WWII, there was already a well tested tradition of using pistol rounds as a "mini-carbine" otherwise known as a "sub machine gun" -- this is the principle of the Tommy Gun: using the .45 ACP in a longer barrel (mini-carbine with or 12" barrel) or the M-3 Grease gun (8" barrel) designed to fire .45 ACP or 9mm Lugar or the British Sten Gun and Lancaster (9mm) or the German MP20/40 (9mm).
Our beloved M1 Carbine is a really a hybrid -- half pistol, half rifle -- one of the best compromises between the pistol and rifle that still fills a niche 70 years later. Because of its versatility, some military people expected it to be the "universal" gun was expected to do more and more --an unrealistic expectation. The M1 is like a good friend, a good partner, a reliable buddy, a great protector, but she's not an assault rifle, not a sniper, not a long-range blaster, nor a machine gun.
The reason the M1 is loved by many is that we understand her qualities and limitations. Conversely, the reason she was despised by some is because they were expecting her to perform beyond her design expectations.
If I had to survive in the woods for several years, and had the choice of only one weapon, it would probably be my M1 30 carbine. Second choice: my PTR-91 (HK G-3) .308/NATO.
Both are quite reliable, very accurate, easy to handle, powerful enough to hunt and protect.