I just recently started to shoot the 3 finger under method and found my arrows were flying much faster (I shoot 692 grain arrows out of a forty five pound longbow so the speed difference was quite noticable). The reason it seems is that while using the same anchor point as split finger(middle finger in corner of mouth) shooting 3 under increases my draw length a full inch. My bow also seems quieter and my effective range has increased to eighteen meters. I did not change the nock, it still sits five eighths above the shelf. Has anyone else experienced an increase in speed and accuracy with this method as opposed to split finger? And can anyone explain why my draw length increased?