Originally Posted by StoneTower
Have you checked the bullet diameter? 7.62 Russian calibers are usually .311 rather than .308. It has to do with measuring to the lands rather than the groves. You may be resizing your bullets and doing God knows what to your barrel. Better check those bullets.
Hummmm! Maybe that's why they hold such a tight group. The only problem I have right now is the powder is really nasty! I can only get about 250 rounds out before I have to clean the chamber in my AR10. Thanks for the heads up.