Kudu3, I shoot an Excalibur Micro. It uses a 16.5 inch bolt. It cocks by hand fairly easy.... If I had to pull three more inches it might make a cocker necessary for me. The excalibers can be un-cocked by hand too, which is another plus.
That would be illegal here. We have an 18" minimum. No idea what the reason is for that, but gotta deal with it.