let's see. first hit yourself in the head with a 10# dumbbell and then try it with a 9# dumbell.
look its simple. carry is defined by angle of entry and ball defelection. your ball hits only 4 pins for a strike. that is it. carry can also be attributed to revs, speed, axis roation etc.
the fact is all three weights will allow you to strike. use the weight that you physically throw the best and the longest.
why do pros use 15 more and more. well if there is no real difference in weight why not drop an pound and be stronger at the end of 16 games. less wear and tear. plain and simple it's all gravy to the pros since they all carry.
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It was a fine time for me - I was learning to fence, fight, anything anyone would teach me