Not a good idea, it'll create more piston rock. Under the pin bosses are a better spot to remove material. The old 12-1/2:1 440 domed pistons were like cinder blocks weight-wise and I've taken a huge amount of weight out of a bunch of those in those areas. Lighter wrist pins are also an option. Just know that in a street engine, you will never know the difference if the pistons are 10 pounds each or 2 pounds each. In a race engine you will.