I have a Saiga .308 with the 16 inch carbine barrel. I don't waste my time reloading for it because it isn't a rifle made for pinpoint accuracy. My rifle is capable of consistently hitting a 16 inch metal target at 300 yards using the cheap polymer-coated steel cased 150 grain ammo from TULA or Wolf or various other Russian ammunition makers. As far as keeping it under 2 MOA, this is possible at 100 yards with the factory ammo listed above; past 100 yards I am not sure. While you have the longer barrel and it should be more accurate than my carbine, this rifle simply will not deliver consistent groups like my friends DPMS LR .308...it is a sub-MOA rifle to at least 300 yards and farther.
One thing that Jeeptim says that I will second, is that the ejection mechanism on the Saiga is really hard on brass, and it is designed per the manufacturer's operator's manual to put a distinguishable mark on each and every casing ejected from a Saiga semi-auto rifle. I don't know for sure the reason for this, but I suspect it is some agreement under the post-ban law changes to keep track of any Saiga that might be used illicitly and to help Saiga get their guns on the market in the US...don't know this, just speculating. Anyway, the point is the Saiga will absolutely beat up your brass and I don't put good brass into it just to have to throw it away if it is dinged up too badly.
I love the rifle and find it a joy and a challenge to shoot, but in a pinch, it will do just about anything under almost any adverse conditions that you may require of it.
Sorry to be so long-winded,
Jasper