M1 Carbine in an intermediate caliber

[floydthecat]

I completely understand the Spitzer profile flies much better at longer ranges, but who desires to routinely take shots out to 350 yards with a carbine and desires to build a cartridge to do that? But it’s fun and entertaining to undertake such projects. I am guilty of like activity myself.

Information

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[DaveHH]

In War Baby II pg 566 there is a section about the SCHV rifle development. It is a carbine with a .22 cal HV cartridge. The Gustavsen rifle mentioned by Jakester below. Working with a max pressure of 42,000 CUP (The estimated highest pressure that the carbine could sustain) the .22 out performed the 30 cal by a wide margin. The rifle was not tested with burst fire accuracy tests. They were just able to crack the 3,000 FPS barrier. Other powders would top out at 29,000 etc.

After this part of WBII, they cover the Winchester light rifle.

[M94/14]

I completely understand the Spitzer profile flies much better at longer ranges, but who desires to routinely take shots out to 350 yards with a carbine and desires to build a cartridge to do that? But it’s fun and entertaining to undertake such projects. I am guilty of like activity myself.

The fact that it increases the usable range of the Carbine is a side benefit. The spitzer bullet carries more velocity and energy at ALL distances, and that is never a bad thing.

Trying to seat a spitzer bullet in a .30 carbine case and keep to the 1.680" OAL so it will fit into the magazine and not have a gap where the ogive meets the case mouth is not easy. When I experimented with this many years ago, the only projectile that I've found a limited amount of success with in that regard was the Sierra 110gr Hollow Point #2310. Even so, the bullet has to be seated around 3/16" deeper than the regular 110gr FMJ which reduces case capacity drastically.