So is the 7.62 x 39 an accurate cartridge for more precision shooting?
I wouldn't imagine people using run of the mill corrosive in it.
I am speaking with limited experience here as I have only had my ruger American ranch 7.62 x 39 out to the range once (just got it) but my results are as follows
Chinese surplus - 1.2 MOA @ 100 yards
Romain surplus - right on 1 MOA @ 100 yards
Czech surplus - .78 MOA @ 100 yards
Barnaul FMJ - 75 MOA @ 100 yards
Hornady Black SST -.60 MOA @ 100 yards
Lapua FMJ - .52 MOA @ 100 yards
Results are promising enough to enjoy and keep the rifle. I have a feeling all my groups will come down a bit when it's not windy and blowing freezing rain at me. Furthermore, when I can justify using large rifle primers for 7.62 x 39 I think my hand loads will take me well under 1/2 moa. It is a precision rifle / caliber.... Depends what you consider precision. In my opinion, it's precision enough for what I need.
In all honesty, I bought this rifle due to the threat of banning the sks, type 81 and my 858 is already banned. I have a metric sh*t ton of 7.62 x 39 and needed something to eat it.