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Has anybody done a 40 S&W to 357 Sig conversion if so what barrel length's are available ?
357 Sig conversion's
- Thread starter Stephen Heidelberger
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I bought a barrel and recoil spring to convert a SIG P239 from .40SW to 257SIG years ago. Now I only see kits for the P320 and P229. I wasn't happy with the results, in terms of ballistics and ammunition cost, and never attempted to reload 357 SIG.
If you want .357 Magnum ballistics, look to 10mm. 357 SIG promised but didn't deliver, but 10mm has enjoyed a dramatic recovery in popularity. Consider 10mm to be .40SW on steroids (having once suffered the reverse).
If you want .357 Magnum ballistics, look to 10mm. 357 SIG promised but didn't deliver, but 10mm has enjoyed a dramatic recovery in popularity. Consider 10mm to be .40SW on steroids (having once suffered the reverse).
Over the last few years, I've had no trouble converting two semiautos from .40 S&W to .357 Sig. One was a full-sized Glock, the other a Sig P226. I believe the conversion barrels for both guns were from Wolf. As I recall, shorter barrels were available.
cowboy94916
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I have a M&P 40 Smith full size. Its setup for 40, 357 sig and 9mm. I just change barrels and in the case of the 9mm magazines. Works great for all. Only time I ever had an issue was, with range pickup brass, reloads that had some glock 9mm cases in the batch.
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Bought a factory S&W .357 SIG barrel for my 1.0 M&P .40. Function was fine, accuracy not so great.
Bought an EFK Firedragon .357 SIG barrel for my 4" FNS .40. Accuracy was pretty good.
Bought a TR Enabling .357 SIG barrel for my Shield .40. Accuracy is as good as with the .40 barrel (meaning I'm pretty happy with it.)
I do reload .357 SIG but it's not as simple/easy as 9MM or .40 S&W. Ran into some crimping issues which turned out to be some cases that were longer than others. Never had the issue on straight walled cases. Before I start reloading for .357 SIG again I'll be trimming the cases to the same length. Hate doing that with pistol brass but that might be the fix.
Bought an EFK Firedragon .357 SIG barrel for my 4" FNS .40. Accuracy was pretty good.
Bought a TR Enabling .357 SIG barrel for my Shield .40. Accuracy is as good as with the .40 barrel (meaning I'm pretty happy with it.)
I do reload .357 SIG but it's not as simple/easy as 9MM or .40 S&W. Ran into some crimping issues which turned out to be some cases that were longer than others. Never had the issue on straight walled cases. Before I start reloading for .357 SIG again I'll be trimming the cases to the same length. Hate doing that with pistol brass but that might be the fix.
Get the Lee Factory Crimp Die for the 357sig, it is collet style and case length doesn't matter with it.
Rosewood
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