I enjoyed it. I agree with you on overall mass not affecting much inside of 20. I can shoot arrows ranging from 500-800 grns out of the same bow inside 20 yrds, but as soon as I start moving beyond that, the heavy arrows start getting heavy!
One thing to keep in mind about point weight though is that if you start affecting dynamic spine, you might be able to hit where you are looking at 12 yards, but has the arrow recovered and straightened out? If your arrows are coming in at angles, lots of penetration power is lost. Some bows are sensitive to arrow spine while others, such as closer to center shot bows, will accept a wide range of spines. Not trying to pick a fight. Your arrows looked to be hitting straight on, but just something to consider.