Relic add accuracy to Jackson it misses too often.
Jackson without HVAP: 0.05/0.045/0.035
Jackson with HVAP: 0.06/0.05/0.04
SU-85: 0.05/0.0375/0.025
Jagdpanzer: 0.06/0.05/0.04
Panther: 0.06/0.045/0.03
Jackson's accuracy isn't that bad given the fact it has high damage and good penetration. Furthermore the weapon(s) has 0.75 accuracy on the move. A vehicle such as the Panther which has shorter range and generally will be moving to chase/engage tanks has only 0.5 moving. 0.65 if you're the OKW variant without vet. The poor SU-85 hasn't caught up. All it has going for it is its fast rate of fire.
Near accuracy generally isn't as important given that you'll probably scatter into the other tank if you're that close and most tanks have a target size of 20 and over.