Ultradot holds up well. Whitworth has been using them for a while and regards them highly. He uses them on big boomers without a hiccup. I put one on my 500JRH and love it. Either platform will be fine. While I do agree with lefty I would not hesitate to put one on my Ruger Bisley 45LC. The Bisley will be lighter and handier in my opinion. But with a ground blind you can use some shooting sticks if the 454 feels heavy. A ground blind will work nicely in dense woods(what we have in Florida). The key is to put the ground blind up early so the deer get used to it being there. Also, practice shooting with the sticks. I have the Bogpod with PSR. Check them out.