
Originally Posted by
scumdog
They ALL tumble on impact, 7.62x39 breaks in two regularly due to design.
They tumble because a 'long 'n' thin' spitzer (pointy) shape bullet, which you'll find in all military calibers, is good for range and accuracy but can't maintain its orientation during terminal ballistics, ie, after it hits something. That's why 'elephant gun' cartridges, like most belted magnums, .416 Rigbys etc are often loaded with short fat round-nose bullets, which will keep pointing forward and get better penetration in a hard target. Like a pachyderm's head.
Spitzer bullets aren't designed to break in two, they're designed for superior ballistics over a longer range. Any fragmentation is a side effect of the design.
The flimsy wee 62gr 5.56mm FMJs are renowed for fragmenting on impact within 100m range or so. After that they slow down enough that they don't break up when they hit.
I haven't heard much on 7.62x39s (the AK47 caliber) breaking up - would imagine they'd be less likely to do so than a 5.56, since they're a more solid and heavier bullet. Certainly 7.62x51 (.308) bullets don't have a rep for fragmenting, and I've never seen an FMJ one do so.
There's plenty of info and photographs of terminal ballistics tests in gelatin (ie, shoot into a long block of it and take a lengthways photo of the hole) on the net re. the various calibers.
My arsenal? Hmmm...
Franchi SPAS-12
Mosin Nagant M-38 (1943 Izhevsk production)
ex-Australian Army L1A1 SLR
Marlin .45ACP Camp Carbine (suppressed)
Remington .308 semi-auto
Ruger Mini-14
Ruger 10/22
Beat-up old Norinco .22 semi-auto
Next I want a Mk. 5 Enfield Jungle Carbine. And a Garand, but I doubt I'll be able to lay my hands on one for an affordable price any time soon.
kiwibiker is full of love, an disrespect.
- mikey
Bookmarks