Just thought to mention....re Underwood ammo...I have shot a LOT of Underwoods  357 SIG loads.  I have hoarded quite a bit of it with the Speer 125 gold Dot but note:  I have had a number of S&W M&P's full size and compact, in 357 Sig.  I did have one in particular (full size) that could not shoot the Underwood loads.  The 357 Sig barrel in that gun, was extremely accurate, more so than most but, it would not handle the Underwood ammo...to hot in that barrel.  No problem in any of the other guns.  I suspect dimensions of that were on the tight side, (possibly the chamber too though I don't actually know) but using that particular barrel, it would drop the primers out of the fired case.  I could switch that same barrel into the other guns, and get the same result...primers falling out.  Nothing of the sort with the other guns and other barrels.

So it just goes show that each combination can be somewhat of a rule unto it's self.  Which is why when reloading, the same applies... A number of guns may take a top loading combination...and the next one won't.  Don't assume, test.

At 25 yards, 1"  w/Ramshot Silhouette, 8.6 gr., Starline brass Win L.P. primer, and IMI 180 gr. FMJFP. Shooting Sig 220 Elite.

Factory ammo w/Speer 125gr. at 1427fps out of my M&P Compact.  A little faster out of the full size M&P

Very nice....

I box....still available ? 

I put one in the cart at Buds...it showed one box in stock.

Mine has been a real tack driver...seriously accurate.....

Are the Remington versions long slide hunter available now... ?

The good news is you can pick your poison as to capacity.... I have had the Glocks, they never really fit my hands...at all, nor do most high capacity in 40 or 45 though I have a number of them.  In gun fights fast and accurate is most likely to come out on top.  The old I must have 13 rounds ish is to me, more a matter of comfort but in the end, training, speed and mental preparation  trumps.  If you have little of those, high round count will only save you if you are lucky, and I don't trust to luck nor do those serious about surviving a gun fight. 

Thanks a bunch Sean 

I  likewise tested my Sig 45 mags in the 10mm and they ran just fine...fed Hornady xtp smoothly..

Sean Thornton....We is a usual best place for low prices on the 45 mags...

Thanks

 
Well if someone measures it, let us know...specs could be updated.  I am aware of common specs for twist, just wondering what they picked.

Thanks for the edit.
I didn't know if there was a model I wasn't aware of, or if the specs were different.
Since it is the 5" your talking about, the the slide weight etc wouldn't change which was all I was wondering.

sqlbullet

In your spec for the 220 10mm you list the barrel length at 4.3 inches.
Spec for the 220R shows as 5.03 inches....
Just wondering....and slide weight ?

thanks

One thing I haven't noticed is the barrel rate of twist...
Does anyone know the rate of twist ?

As far as my view on the round count difference between the Sig and the Glock...where it applies (and I believe this is where it may), it makes no difference.
I saw this on a forum recently and saved it because in applications such as this, I think the difference is mute:

"Start with the pepper spray, this is what the State of Alaska recommends because your odds of surviving are greater than starting with a pistol.
IF, the spray is ineffective in stopping a charging bear you will most likely be in contact distance so fast you will not get many if any shots off. However, if you have icewater for blood and exceptional pistol shooting skills you may be able to fire before the pain begins. If this is you then you are not asking too much from the 10mm with heavy HC loads because they will penetrate the skull and you are familiar with the Glock. If this is not you then a .40+ caliber revolver loaded with heavy HC that will not malfunction when pressed between you and the bear is a much better choice. Expect to die and be happy when you are only maimed. Good Luck".