A break in procedure I read was to shoot any lead bullets, cost had not bearing so Blazers were as good as Eley, etc. This procedure was not Anschutz specific.
Clean, shoot 100 rounds, clean, shoot 100 rounds, clean, shoot 100 rounds and clean.
Copper clad bullets could perhaps destroy all of the previous preparation so cleaning and starting over might be required.
As to the merit of the above, the only thing that appears to support it is trying to get accuracy after using copper bullets and cleaning.
Even using Blazers, it appeared accuracy improved as the lube was laid down in the bore but whether fact or a statistical appearance without measuring based on 5, 10 and 20 round groups. Everyone might have different results if blowing 100 rounds is within your means. A friend leant his Anschutz to someone using copper bullets. Accuracy was lost with match bullets but was restored with a good cleaning however, he believes his rifle requires about 50 rounds to restore accuracy after cleaning.