Sorry for the late reply. Yes, im cutting my out wads using dense cardboard. Planning on using unique powder and #9 shot. I read somewhere that a 460s&w case will fill the length of the cylinder in my redhawk and i have 454 casull dies to size them down. My buddy is doing 500s&w shotshells so i wanted to experiment with my 454. Do you see any issues with starting at 4.0grns of unique and then filling the rest of the 460 case with #9 shot. And laddering up .5 grns at a time up to 7.0grns? Pretty much just need a low safe starting point so that i can work from there with different charges, wads, and shot.