Of course the additional inches should add a bit more muzzle velocity. MagTech of Brazil offers a SJHP cartridge for SD use:
85431 .32 S&W® Long SJHP 98gr 778 fps MV 132 ftlb ME This appears to be designed for SD as the ballistics exceeds any of their other .32 S&WL loadings. As you can see it equals or betters the .32 ACP sd rounds in weight and energy.
The above quote is taken from the Sportsmans Guide on-line catalogue.
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