357 sig vs 40 S&W

[wow6599]

Just make it the original .357 Sig for me........the 9x25 Dillon.
Apples to Oranges

 

[fletchbutt152]

Don't know what you're thinkin' for the gun, but the 10mm is better than either!

 

[possum]

i prefer the .40 and there are several reasons why,
1) it is common, and no where near as expensive as 357 sig factory ammo.
2) i reload .40 and have been for years.
3) the .357 sig cartridge has a bottle kneck and that is one more thing to worry about when reloading.

 

[Kingofthehill]

I got a .357 Sig M&P for an amazing price and i had to jump on it. for $60 you can get a factory M&P .40 barrel which is a true drop in with no other parts necessary.

I now use the .357 Sig for self defense/carry/home protection while i use the .40 for range fun.

.357 sig in my experiences has shown an amazing round. i mean jaw dropping!... compared to .38/9/40/45.

In all my testing which is very very non scientific, the Gold Dot .357 sig has just been phenomenal!...

im totally sold on the .357 sig. just as i am with the 10mm.

Seems that most opinions here come down to ammo cost. Well, my life is worth it

JOe

 

[ny32182]

The only .357 SIG rounds I've shot were factory reloads, I believe, so they were probably comparable to standard practice loads. Everybody feels recoil differently, so we can't always count on that, but at least by the numbers .40 S&W loads almost always have greater momentum, and therefore recoil. Only the very hottest .357 SIG loads will just about match common heavy-bullet .40 S&W factory loads in this respect, but not exceed them. And I've never seen a .357 SIG load that, on paper, can match a hot .40 S&W load in recoil. To me .40 S&W actually feels heavier, but that doesn't bother me as much as the blast from .357 SIG (fun at the range, but not necessarily in actual use in defense).

I think you'll find that when you have two bullets of equal momentum and all other factors being equal, the heavier one will yield less recoil. Therefore most competitors that need to make 125k power factor with a 9mm will use a 147gr bullet to do it. Power factor is a pure momentum calculation of weight(related closely enough to mass in this case) times velocity; different than "energy" that is quoted for most factory loads.