357 SIG in Glock 35
Several years ago I chronoed some Pro Load 357 SIG (no longer available) ammo from my Glock 35 with KKM barrel. It averaged 1570 fps over my Pro Chrono. The same ammo, which was loaded with Speer 125 gr Gold Dot bullets, went about 1500 fps from a KKM 4.4" barrel, and 1395 fps from a Fire Dragon 3.5" barrel.
So it seems to me that full power 357 SIG ammo benefits greatly from longer barrels. I did not have a 357 SIG barrel when I owned a 24, but I would have liked to chronograph some ammo from a 6" or 6.5" barrel just to see what it would do.