Nope...
PP.
I tend to disagree,PP...if you put the SKS in a vice or something else not human related,then you might be right,because birchwood,(when cut to fit!) supports the action and frame more than some soft polymer,but circumstances given that a human holds the rifle and everybody being different,all those that have a "better feel" with an aftermarket stock will shoot better with one...I got lucky there,I'm a "short" guy,both applications work for me,and often It's the ammo why you're not accurate.