I'd love to see 7.65x20mm French Longue make a comeback, along with modern bullet design/construction. Call it .32 Super Comp for the US market. I'll wager you could drive a 100gr or 110gr pill at a fair clip, and the sectional density should allow pretty decent penetration at that weight. Low projo weight would mean low recoil, but I bet you could also get the pressure up enough to drive a comp to drop recoil even more. If it could be made to pass the FBI penetration standards, think how many you could stuff into a typical modern service or carry pistol.