That does not look good.  It's time to try scrubbing with wire brushes, but that may not help.  What did you use for the conducting liquid?  Did you replace the liquid during the electrolysis?  What color was the liquid after treatment?

I did that to a Kropatschek fired with black powder & steel jacketed bullets and to a Siamese Mauser last cleaned 50+ years before.  In both cases, it took 3 10-minute treatments.  The liquid was nearly clear after the last treatment.  After all that, both rifles are capable of paper-plate accuracy at 100 yards, but will not hit anything smaller without a lot of luck.

Maybe it is time for test firing.  Try jacketed bullets first.