Is there a "rule of thumb" to go by when selecting your arrow lenght compared to your draw lenght. My draw lenght is 27" and my arrow lenght (without any broadhead or tip) is 28" which makes it be 30" with my broadhead. A guy @ a bow shop is going to put a drop away rest on for me & he said I needed to cut off 2 inches on each arrow. Does this sound right? Most of the other guys I've talked to say there arrow lenght is shorter than their draw lenght. I didnt decide that arrow lenght, the previous shop (that I dont use now) where I bought my bow from said thats what I needed, and me being new to the sport believed him. Whats ya'lls opinion?