What barrel length are we talking about? At 18 inches it is 70% more energy. How much shorter you think you can go with our laws? What are we comparing really? Abstract 8 inch 308 vs an abstract 22 inch 7.62x39?Yes, 308 still produces better energy, but is much less efficient in shorter barreled rifles.
Realistically speaking we have sks (20 inch), cz 527 (18.5 inch) ruger american ranch (16.1), savage axis II scout (20 inch).
The shortest common 308 factory is probably Ruger Scout 16.1 inch barrel, are we going any shorter than that? I don't think so. We still have 26 inch overall length limit to keep it legal. Would it be better to go with 20 inch 308 - absolutely. Would it have advantage in both ballistics and energy over 7.62x39 - yes. Does that advantage matter all the time - no. Is cz 527 light handy and neat? Yes. Would you ever choose 7,62x39 if the price of ammo per shot was the same as 308 and price on sks was $1k... very unlikely.






















































