OK folks, I did some reading on the 5.7 and now I am interested. It appears it's a significant step up in performance from the 22 WRM, and from the video I watched not all that loud. According to Brian Pierce in his Handloading article, 45 grain bullets can be hand loaded to over 1800 FPS from the FN 4.875 inch barrel. I was surprised to find Starline does not list brass for this caliber, but apparently there is no shortage of available fired factory load brass or loading dies. At one time I was interested in a PM-30 22Mag pistol, but read of disappointing accuracy results, so that idea was nixed. Hopefully this Ruger 57 will prove better. I am in a "wait and see " mode, but watching with interest. Just like the new 2020 Python, I want to see and handle one before making a commitment with cash.