Danny,
Same thing happened to me last year. I bought a 58" 58#. Super Shrew Samurai from Chromebuck. When I got it I tried shooting it and it was everything CB said it was, very smooth shooting.
It then sat on the shelf while I played around with my other bows. I did occaisionally wonder why I bought it. Then this spring after struggling shooting the other bows, I put them down and pulled out the Shrew.
It shot so nice I took it to a Archery shop and put it on a scale. It came out a hair over 55, which made sense. But the difference in weight is not the main reason it shoots so well for me. Something about the ease of draw until I hit my anchor is unique on this bow. Don't know what it is, but I can shoot it comfortably alot longer than most of my other bows, and this is the heaviest bow I currently own.
Once in awhile an impulse buy is a good thing!