First no way are you going to get a 14-20A using 110 shot 10A is the highest you should go. The velocity necessary to go higher would be extreme and you are no longer peening. You would be abusing the part surface,
In your post you are only comparing sizes. Are they also of equivalent hardness? If not there is your problem.
Are you allowed to substitute CCW for Cast Steel shot? AMS 2430 does not give you permission to do so, it just shows what is equivalent.
