pacecars, I lost some too, I was telling Big Jim think of a 50-90 Sharps as a 2.5 inch cased 500 Nitro Express.
Think you mentioned something about that too, I have no doubt a 50-90 loaded with the right smokeless in a Ruger #1 would push the 570gr solids and softs to an easy 2150 fps, the excellent Starline brass would handle that easily.
I load H-4350 in my 500 Nitro, a powder too slow in a straight walled case, but fills the monstrous case with no fillers needed, really accurate and regulates beautifully at 2168 fps with nice lower chamber pressures for the doubles.
