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Originally Posted by StatesRightist
The .357 Sig does not match the .357 magnum ballistics, that is an urban legend. It does not perform better from a defensive stand point than +P 9mm rounds and is more expensive to shoot. It's only advantages are it shoots flatter at distance, but minimally, it's louder and harder to find ammo for.
What you essentially have is a 9mm bullet sitting on top of a .40 body. If you feel compelled to buy a .357 Sig, buy a 10mm, then at least handloads provide some of the advantages claimed for the .357 Sig.
Everybody is different, but there is no distinct advantage to the .357 Sig.
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I am not sure that there is a single correct statement in this post.
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The .357 Sig does not match the .357 magnum ballistics, that is an urban legend. .
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The goal of the 357SIG was to develop a semi automatic duty cartridge that would offer ballistics similar to the number one stopping cartridge of all time. The 125 JHP 357 Magnum when carried in 2 1/2" - 3" revolvers.
According to most published factory figures the 125 JHP 357 Magnum leaves a 4" ported barrel at 1450 FPS. As we know most factory statistics are slightly exaggerated. Winchester 125 JHPs averaged 1315 FPS when fires from three different 3 1/2" model 27s that I had access to on that day.
In contrast the Federal 125 JHP 357 SIG load was chronograpned out of a P229, P239 and USPc. The firearms produced 1350, 1341 and 1331 respectively.
To me that sounds like SIG achieved their goal for the 357SIG
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It does not perform better from a defensive stand point than +P 9mm rounds and is more expensive to shoot. It's only advantages are it shoots flatter at distance, but minimally, it's louder
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Based on your thinking the 357 Magnum would fall into EXACTLY the same category as not being a better stopper than the 9MM +p.
After all a 357 Magnum is only a faster 9MM. The difference between .355 diameter and .357 diameter is meaningless for stooping power.
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If you feel compelled to buy a .357 Sig, buy a 10mm, then at least handloads provide some of the advantages claimed for the .357 Sig.
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You have got to be kidding me. The 10MM requires a full size platform to be fired from. Also for firearm longevity it requires a steel frame whereas a 40/357/9 can all be place on alloy framed firearms. One of the goals of the 40/357SIG cartridges was to put more than 9MM power in a platform that is 9MM sized.
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Everybody is different, but there is no distinct advantage to the .357 Sig.
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Simply not true. For a 9MM to begin approaching 357 SIG performance it is necessary to exceed SAAMI pressure limits for the cartridge by a significant degree. This is why +p and +p+ designations exist, as a warning to users that this is intended only for firearms of modern design that are in good mechanical condition. The 357SIG achieves it's performance without exceeding the pressures it was designed to work at.