I use irons on my m70.
I recently bought a Vortex Diamondback 3-9x40 scope for my Vepr 308.
The glass has a nice clear image. I liked it better than a Nikon and some other brands in the $200 price range. If I were shooting a bolt action at 200+ yards, I'd rather have a scope with greater magnification.
I have the Vortex mounted on a Midwest Industries AK mount with Weaver Grand Slam rings. I tried several different rings and these particular ones get the scope down low enough so I can get my cheek comfortably on the stock. I am using the extra-high weaver rings that have a height of .570". You could probably go slightly lower and get the Weaver Grand Slam Top-Mount rings that have a height of .560".
I really like the Vortex BDC reticle. It makes it quick to get on target.
(Not my image.)
While sighting in the scope and just having fun, I noticed I got decent groups when I let the barrel cool down. When I fired several rounds, my groups opened up and raised up about an inch or two. I fired 60 rounds of 7.62 ZQI 147gr and 20 rounds of .308 Federal Fusion 150gr
Here are the groups I was getting at 100 yards when I let the barrel cool down. (I jerked the rifle to the left on one shot.) I'm not the best shot so I'm sure the group could be better.
Here is what happens after firing many rounds and getting the barrel real hot. This is at 100 yards also. I fired these shots pretty quickly.
Overall, I really like this setup. I can get my cheek on the stock and do quick shots. For precision shooting, it would be better to get a scope with more magnification. But I like the 3-9 for a battle rifle. I think it would be harder to make follow up shots when zoomed out even further. The Midwest Industries scope mount gets the scope nice and low. I like it better than the BP-02 scope mount I had previously.