Debating if the investment is worth it.

[garand4life]

A buddy of mine gave me a box of .357 sig. Just regular white box winchester (100 round). I'm debating whether or not to buy the drop in barrel for my M&P so that I can shoot them in my .40s&w. Is it worth buying the $100 barrel in the long to have 2 caliber ability in the same frame? Looking long term here.

[tombogan03884]

Yes, especially for calibers that are not as common as the old standby's.
Before any body gets irate and talks about how there's plenty of .40 and XXX number of Cops carry .357 Sig, let me point out that neither of those calibers were adopted by a military force and neither is 30 years old yet.
.45 ACP and 9MM have been in production for a century with many countries producing millions of rounds per year.

[Timothy]

I would...the balistics of the .357 Sig are pretty damn impressive.  Far better than the .40 S&W and close to the .357 magnum.  I have a buddy that swears by that round, shoots really flat and he quick shoots his Sig to 100 yards and just keeps ringing the steel......

Actually, I'm seeing more and more of it on the shelves around here..

[WatchManUSA]

The only problem with .357 Sig is ammo availability.  If you reload or have easy access to ammo it is a fine caliber.  However, around my neck of the woods you would be hard pressed to find a few hundred rounds.

[TAB]

for 357 sig, I would not buy a barrel.   now I would buy a 40 barrel for a 357 sig gun.


reloading 357 sig can be a headache.  you need to treat it like rifle brass, I've also heard it wears out pretty fast even with mild loads.

[Sponsor]

[fightingquaker13]

Iwould never buy a dedicated .357 SIG. BUT, if for a $100 bucks, I could have the option if the cartidge catches on? The answer is yes. Worst case, you're out one bill. Best case, you get two good options from one gun.
FQ13

[Badgersmilk]

Iwould never buy a dedicated .357 SIG. BUT, if for a $100 bucks, I could have the option if the cartidge catches on? The answer is yes. Worst case, you're out one bill. Best case, you get two good options from one gun.
FQ13

+1

[Paraguy]

Can you use .40 magazines for .357 Sig rounds?  If so, you may need to pay for magazines as well, not sure of their cost or availability.

[garand4life]

All of my factory mags are engraved .40S&W/.357SIG

[twyacht]

All of my factory mags are engraved .40S&W/.357SIG

Yes but I believe the follower in the mag is different. It is slightly deifferent to accomodate the shouldered round of the .357 Sig. But I too have pondered this chance to use the same pistol for two calibers in my full size M+P .40.

Try loading some rounds in your mags and see how smooth they work.

I understand also that there is the 9mm drop in barrel option bantered about but with some extractor reliability issues.

Storm Lake sells .357 Sig barrels for the 4.25 inch M+P for around $100.

If I'm wrong about the follower than I will smack the "know it all" at the gun show in Jan.

http://www.topglock.com/item/75895_Storm_Lake_Barrels_and_Choke_Tubes_Storm_Lake_Barrel_Smith_.aspx

lonewolfdist.com has one too, did a little digging and I think the mags may work as is. let me(us) know..