In what way?
Bottleneck increases long range ballistics at the cost of short range energy - exactly the opposite of what pistols need.
In what way?
"Properly designed hollow-point ammunition - regardless of caliber - all perform very close to each other when you take expanded diameter and penetration depth into account:
Note how little difference there is between the high-velocity .357SIG and other "slow-poke" rounds. The temporary cavity size is also virtually identical."
You decide.
Quoted from: http://ammo.ar15.com/project/Self_Defense_Ammo_FAQ/index.htm
Here's the problem I have wrapping my head around the 357 sig debate. Most say "it's not any better than a 9mm +p". But if a 9mm +p is way better than a standard 9mm, even though it's only going 150-200 fps faster, then why isn't a 357 sig even better, since it's going 150-200 fps faster than a 9mm +p?
That's why my 9mm SD ammo is +P+.
We can argue the best caliber all day, but the fact is that .357 Sig is a good SD round, and ammo seems to be around when others are scarce.
For the $70 price of another barrel, to me, it is a cheap investment for another caliber option.
One thing that has not been brought up about the .357Sig is barrier penetration.
If a bad guy is shooting at you from behind a car door, for example, it might just make a difference.
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