The sentence appeal was postponed pending the outcome of the Court of Appeal's review of sentencing for methamphetamine offending.
As a result of the review, in October last year a new guideline judgment was announced in relation to sentencing for methamphetamine offending.
The judgment stated, among other things, that meth dealers who can prove their own addiction caused their drug offending could have their sentences cut by 30 per cent.
In February this year Harding appealed his sentence for a second time - on the basis that the new judgment had changed sentencing levels for manufacturing methamphetamine.
But a decision today revealed his bid was dismissed. "We are not persuaded that the matters raised support the conclusion that the sentence imposed was inconsistent with the approach to methamphetamine sentencing adopted by this Court," the decision stated.
"Nor are we persuaded that the sentence was manifestly excessive.
"The appeal against the sentence is dismissed."
At sentencing, Justice Moore said Harding's "total lack of remorse" was also concerning.
"You insist you did nothing wrong and, even more startling, you're recorded as saying you'd do it all again," he said.
"That is a breathtaking statement, which unsurprisingly led the probation officer to conclude your risk of reoffending is high and your risk of harm to others is also high.
"You are not and have never been addicted. You've never been a user of the drug. This
means the only reason you embarked on this exercise was to accumulate wealth."