Yes, Ralphs will not double but three at a time. Also, even if the check out person allows, make sure that the computer doubles anything past 3. They override but often the additional coupons are taken at face value, not doulble.

Or, pull the buy-3-go-to-car-and-return, move. I did this 12 times at one store. With double coupons $1 a box.