Comments on: The New 25KPC Cartridge – Testing A ‘Quarter Bore’ AR-15

By: jwtaylor

jwtaylor — Sat, 21 Dec 2024 23:54:38 +0000

In reply to uncommon_sense. Maximum cartrige overall length for the AR15 pattern rifles is determined in large part by magazine length. For those rifles, internal magazine length will range from 2.270" to 2.316" depending on manufacturer and material.

By: Simple Jack

Simple Jack — Wed, 11 Dec 2024 04:11:52 +0000

So, like 6mm ARC then, OK.

By: uncommon_sense

uncommon_sense — Wed, 11 Dec 2024 01:04:45 +0000

It sounds like people want to use this cartridge in AR-15 platform rifles if I am not mistaken. If that is correct, how will that work when the 5.56x45mm NATO cartridge is specified with an overall length of 2.26 inches and this 25KPC cartridge has a maximum cartridge length of 2.31 inches?

By: 10x25mm

10x25mm — Mon, 09 Dec 2024 21:18:02 +0000

A .250-3000 for the 21st Century.

By: No_Ones_Home

No_Ones_Home — Mon, 09 Dec 2024 19:31:27 +0000

Interesting cartridge and I can see the potential for it. Thank for the write-up.

Two items:
1) 6.5 Grendel? 90g for varmints & 123g/129g for hunting. Can be shot out of an AR platform. Ruger (American Gen 2) and Howa (mini-action) offer bolt options for the caliber. If Howa offered their mini-actions with a carbon fiber barrel to go with their carbon fiber stocks, that would be one ungawdly light rifle to pack around all day (week?) for antelope or mule deer.
2) V-Max. For varmints? Yes. For game hunting? Ugh! Your photo above proves that. I use V-Max to turn prairie dogs into red mists but wouldn’t be using them on something I’d want to eventually eat. As you wrote above, a 100g or slightly heavier weight would probably be more practical for game hunting. Nosler Ballistic Tip hunting in 100g? Similar explosiveness & energy dump without completely liquifying everything it it’s path.