RE: how long can you pull back.....
On the 140 class buck that was approaching me earlier this fall, I had to draw before he came out from behind the brush because there was no cover after that and he was facing me. He stopped at 20 yards, still facing me and rubbed a tree and made a scrape all without offering me a shot. When he finally turned and started walking, I had to wait for him to clear some small branches. When I saw a clear path to his vitals, I dumped the arrow. Too bad I forgot about TRAJECTORY! [:@]
Total full draw time was over two minutes.