I will agree that Century has sourced very accurate barrels. I personally shot a RAS47 which would regularly group generic Tula fmj into an inch-and-half at 100 yards, often with two or three bullet holes overlapping in a 5 shot group. HOWEVER it is not a durable gun in the sense of a combloc bullet hose. The gun went back to Century for repairs by 800 round count due to peening and mushrooming parts. Yes the parts were replaced and the gun was reliable. If the owner is a typical occasional shooter who might use a box or less a couple times per year it will be a fantastic AK. Accurate and dependable and last for a decade before anything looks askance.
If you purchase ammo in cases a few times per year, self destruction is highly likely. I would note I haven't seen one actually blow up despite internet rumors. I have seen them with horrible wear and sloppy peened parts after a couple thousand rounds. I would note the internet torture test guys literally shoot just for noise and round count. So if you like to do mag dumps every weekend they are a poor choice.