7.62x39 necked down or 6.5 grendel

id be interested to know as well... ive seen some saigas shoot close to 1MOA with a quality barrel.. and crappy barrels are reponsible for a lot of AK-related rifle inaccuracies
 
I'll repeat a postulate I saw on another forum. The x39 cases and most/all other cartridge cases originally designed to be manufactured from steel are tapered to provide optimal feeding and extraction from the chambers of battle rifles. Using this design as is by simple neck reduction is counter productive from an accuracy and performance standpoint when using brass cases.
Chamber pressures can be higher with parallel case walls(brass cases) w/o excessive bolt thrust. Performance and accuracy are normally enhanced since there's less bullet to neck misalignment with less tapered sidewalls.
The less developed countries used what was available w/o much regard for what might have been improved as witnessed by the decades long use of the 7.62x54/ 7.62x39 when better, more powerfull, modern designs could be had. What was good enough in the 1890's or 1947, was/is still good enough.
 
5.45

Not sure how this fits in..........but isn't the com bloc 5.45x399 the very thing that is being questioned......the 7.63x39 necked down??
 
Sort of ish.
It puts a high SD smaller cal bullet in the AK platform. I have an AK74 and an AR 5.45 upper. Both are a little picky if you want decent accuracy. Only reason I have them is the ammo I bought supe cheap about 5-6 years ago and to offset the possibility of UN troops showing up with arms/ammo as different from what most Americans have as possible.
The only real good ammo I've shot is the RWS high dollar stuff and Hornady V-Max. On the plus side, if confronted by several aggressors, you can count on the so called hollow point European ammo to punch through 2 or 3 per round.
 
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