Your numbers look like it, but don't break out any champagne yet (just some beer for the 4th). I'd continue to add 4ppm every 24 hours for a while and see what the results are.
The seeded filters can be a big help, but what worries me a bit is the powdered bacteria you added. Remember jeta and I were concerned because it can give the appearance of a cycled tank although it has the potential to create a very unstable bio-filter (ask my buddy Deckape).
For the foreseeable future, I'd keep adding the ammo and see what it does. We want to be very cautious and thoroughly test the bio-filter to be 100% certain it's safe to add swimmers.