The 357 sig like the 38 Super +P both shoot faster, both hit harder but muzzle velocity is the reason they shoot flatter. The recoil is relative to the firearm it is being fired in. If shot in a polymer based firearm that is light weight it's recoil is noticeable more than a 9mm. 9mm's usually have muzzle velocities around 900 to 100 fps, the 357 sig and 28 Super +P muzzle velocity are in the 1300 to 1500 fps range. I only shot the 357 sig in a friends Glock, was not impressed with the accuracy much less the recoil, and I am not a recoil sensitive person, (up to a point) I have a Tisas 1911 in 38 super +P, and shooting factory ammo it chronographs at 1430 fps but the recoil is considerably less than a polymer 9MM, the accuracy 2 inch groups at 25 yards is much more accurate than most polymer pistols. Ammo costs more, but performance wise you get what you pay for. Handloading brings the cost per round down to the same as cheap 9mm crap, but you get a much better result. As for wearing out a handgun faster than a 9MM, that is pretty dubious as most modern handguns built by reputable manufacturers last 10s of thousands or rounds. I have a friend who has a Glock 17 with over 30,000 rounds through it with only regular maintenance and regular spring changes. There are many 1911s that have made it to over 100,000 rounds with only regular maintenance and again spring and extractor replacements. Unless you have a el-cheapo handgun I very much doubt that you will wear it out shooting either of the mentioned cartridges. I much prefer the 38 Super +p and it's 347 magnum performance over any 9MM, and I have several 9MM handguns to compare them to.