SKS will operate just fine on the cheaper the better ammo.
Sportsmans Guide
...is not your friend. Go to the track orders page, enter your last name, address and zip, and it will display your order history (last 120 days).
Anyhow,2 MOA is mil-spec, which is what all of these rifles are toleranced to, but US-made ammo may help you keep it on the tighter side, simply because of greater consistency in the loading.
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