If you want to stay with the bulk ammo, try the Winchester 333 boxes .. they shoot pretty well in one of my stock 10/22s. They, too, can be had at Walmart.
As stated above, if you want some additional consistency with your ammo, you are going to pay more - Wolf Target Match $6.00 (50), Eley Black Box $13.00 (50), etc....
As stated above, if you want some additional consistency with your ammo, you are going to pay more - Wolf Target Match $6.00 (50), Eley Black Box $13.00 (50), etc....