Sweets 7.62 has works great for me followed up by Brakleen to remove all residue. For tough stuff, a brass soaked J-B compound sees to do the job completely. I have been told to substitute Crab clearer as it leaves a corrosive residue behind.
I'm guessing you meant CARB CLEANER.
Crab cleaner always pits the bore and makes the rifle smell like a cat house.

I buy Brakleen by the case. I use it for everything. Do NOT buy the Wal-Mart brand as it is more like carb cleaner than brake cleaner and WILL damage your finish. I have had it dissolve plastic parts on equipment.
GM top engine cleaner is very good at removing crud but more expensive. I get it at the local Chevy dealer when i need it. I don't think you can buy a chlorinated hydrocarbon product in a consumer outlet anymore.
I still have a 5-gallon bucket of 1,1,1 Trichlorethane and use squeeze bottles to dispense it.
TFF
(Glad i nevr hda a typo!)