Originally Posted by Brad_CCW
The other day I was shooting cheap Federal ammo (light blue box) and getting under 2" groups at 100 yards. The Winchester soft points I was shooting yesterday were giving me 3-4" groups. Some of it could have been me. When using the LR/SR magazine everything seemed fine really, other than brass not ejecting very far. I'm inclined to think the ejector spring is damaged or dirty.
Its entirely possible its gunked with old packing grease or oil.
Thats typical factory ammo groupings for most shooters.
Factory ammo is designed for bolt guns and factory ammo powders tend to be stick type which don't really burn well in semi autos.
I tend to load 308 using varget which is a stick powder that works well in semi autos and I also use w748 which is a ball powder specifically for semiauto.
I've never fired a single factory round out of my scar17 and I don't think I've ever bought a box of shelf ammo 308. So it might be an ammo issue too. I'm just not familiar with off the shelf factory ammo performance in 308.