My Ruger Ranch in x39 does MOA out to 175 (all I have a range for) with Ch-MS, and better with 'good ammo' like Barnaul or S&B - still under $1/round. And my F-T does 2-4MOA with irons - I'm not that great a shot but not alot of 'good. ammo out there.
Hitting 8-1/2 x 11 @ 100 is good for SKS-irons for me since I can't 'see' the bull clearly at 100 ( "paint can" ).
Dang dude you're gettin 1.75" groups at 175 yards with Chinese surplus?