I can tell you a 300gr bullet say-bo-less and 84gr by weight of BH209 is pretty rough in a normal weight 45cal ML. Ive shot as much as 140gr by volume in a heavy build but prefer to stay at no more than 91gr by weight.

My Pacnor 45 is so heavy it really helps with the recoil but the SuperDisc is kinda rough. Extended eye relief is a must in the lighter rifles with large BH209 loads. My Swift Premier 2x7x40WA nearly gets me every time i shoot a highend say-bo-less load. I cant imagine using a 3" relief scope on the DISC with similar BH209 loads.