How many ammo types in your collection are waxed/lubed?
were it me testing I would set those aside, and test all the rest, with a few fouling shots and then shoot for accuracy.
With the lubed, start with a clean bore, lay down a layer of wax with 25 -50 rounds, then shoot for accuracy..... remove that layer of wax with a cleaning and then try it again with your next set of lubed bullets. The wax is matched to the bullet and to check accuracy you want to start at the same beginning..... which is a clean bore.
With all the other ammo you have its a pig and a poke most of it is copper washed, other just leaded, just ensure you don't get a big lead build up.
Much of the accuracy of the lower grade ammo is attributed to how the pressure affects harmonics and how consistently your barrel whips with said ammo. In fact it has less to do with the bore than many think, although the bore is important.