I agree with Bob. One of the most important aspects of "quality ammo is consistency.
Most of us have shot good groups with cheap bulk ammo. Over time though Those groups will not remain the same. This is more true with surplus ammo which can have a few squibs.
Most of us would be very very happy with 10(ten)moa with our handguns. That's about a 1" group at 10yds.
At least two of my guns are capable of that kind of accuracy and I'd bet they'd do better in a machine rest.
But when I come into the equation I'm satisfied with about 40moa. That's keeping everything on 9 1/2 x 11 computer paper at 25yds.
The accuracy of the ammo isn't a big factor.