Accubore is good, but virtually ALL bore cleaners will need some scrubbing.
The "secret" of getting a clean bore is to allow plenty of soaking time, NOT scrubbing.
Given enough soak time, ordinary Hoppe's #9 will get a bore 100% clean.
One trick is to give the bore a good scrub with a NEW brush (brushes wear out quickly, and solvents "eat" them), then fill a small bottle with solvent, drop the barrel in and let it soak for a day or so.
Be sure to use a non-harmful solvent like Accubore or Hoppe's, NOT something like Sweet's 7.62 which CAN damage the bore if left in too long.
If you don't want to do that, scrub the bore then run a soaked patch down the bore every 30 minutes until the bore is clean of all traces of fouling.
(I buy Hoppe's #9 in quart bottles)
Another good method is to buy some JB Bore Paste from Brownell's.
This is a paste cleaner that contains a super-fine non-embedding abrasive that REALLY cleans bores out, WITHOUT damage.
This was "discovered" by the bench rest shooters years ago, who are clean fanatics.
Bottom line: Yes you can get the bore totally clean, BUT you still have to scrub, and you need soak time to allow the solvent time to work.
Solvents work until the liquid is saturated with copper, then they stop working. Thus the need to either have a soaking bottle full of solvent, or to continually refresh it by running more patches down the bore.
Excessive scrubbing isn't needed or even advisable. Soaking is what's needed.