40 super vs 10mm

[memphisjim]

was browsing through doubletapammo and noticed they now offer a 40 super load
at the lower weight bullets it is a step up from the 10mm

can the 40 super run heavier bullets (180-200 grain)?
and if so does it still carry an advantage over the 10mm?

 

[atblis]

Supposing you assume the Double Tap's number are correct, I doesn't look like it'd be worth the hassle. I don't see a big performance difference either.

10mm already has more case capacity than needed for a 4.5" barreled gun.

Straight walled cartridges are easier to deal with reloading wise.

While 10mm isn't available at Walmart. It isn't going to disappear anytime soon. Brass will be available, there's plenty of loading data. Guns aren't hard to get. etc. etc.

More magazine capacity as well.

For 135 gr bullet
40 Super is 1685 fps out of a 5" barrel
or
10mm is 1600 fps out of a 4.6" barrel

 

[SDGlock23]

It doesn't look like DT's numbers are a bit low. I've seen .40 Supers claim 1800-2000 fps with a 135gr bullet.

 

[gp911]

Don't the 135s have issues with breaking up in the 1500fps+ range? If so, why hot rod it well past its intended performance envelope just to make it fragment and come apart even worse? It seems counter-productive to me.

gp911

 

[Jason_G]

was browsing through doubletapammo and noticed they now offer a 40 super load
at the lower weight bullets it is a step up from the 10mm

Don't read too much into those kinetic energy figures. They don't exactly equate to stopping power. More often than not, the more massive bullets tend to penetrate better in gel, even if they are slower. You'd be better off with a more massive bullet, even if it means a lower velocity IMHO. I'd say a 185 gr 10mm would probably trump the .40 super 135 gr without much issue.

Jason

 

[Fortyfied]

This post from a 40Super engineer says he was getting 1400fps:

http://thehighroad.org/showpost.php?p=666378&postcount=25

 

[memphisjim]

from the looks of ir the 40 super is superior
how many rounds does the conversion glock 21 hold?

 

[Loomis]

For hollowpoint pistol ammo, slower bullets penetrate further than fast ones.

 

[BlindJustice]

Yeah, I saw that on Double Tap's site as well. It is noted to not worry
about over penetration. Well, duh, you're driving that particular
bullet far behond what it is engineered for in terms of reasonable penetration
with expansion. I asked the question on two different other forums what is
the case dimensions for a .40 Super? If the .45 Super has the same case
dimensions as a .45 acp, and the .400 CorBon is a necked down .45 ACP with a 25 degree shoulder and a defined length to the bottleneck etc. will a .40 SUper cartridge chamber in a .400 CorBon chamber i.e. Barrel.?

Not that I'm rushing to buy a box of .40 SUper - I don't think anyone
is making barrels for this obscure cartridge.

Randall

 

[Fortyfied]

40Super will feed out of unmodified 45ACP magazines so the capacity is the same for either cartridge. The case is cut to the same length as 10mmAuto but the overall length is the same as 45ACP. The head is the same size as 45ACP except that it uses a small primer pocket and if I recall correctly its pressure rated at 43000psi. DoubleTapAmmo selling 40Super is interesting because they know its going to get used in Glocks; they list it on their site as used in a 6inch barreled G21. What this tells me is Mike McNett of DoubleTap has been able to bring the pressures in his 40Super way down and still get good performance. At design pressues the cartridge is a bit much for long-term regular use in a G21 because the chamber is relatively thinwalled. Mike replied to my e-mail inquiry saying his 180 and 200gr loads will be available soon.

 

[Disaster]

As I understand it, the .40Super and .45Super have thicker cases with rifle primers to handle higher pressures. The 9x23 has a similarly thick case. These might be fun to play with if you are a reloader but are much rarer than the 10mm and there is always a risk that ammo supplies will dry up.

 

[glock21detroit]

what is the max velocity for a 200gr bullet out of a glock 20 4.6" barrel?

 

[VARifleman]

From Double Tap's website,
10mm 200gr FMJ-FP = 1275fps / 722 ft./lbs. - Glock 20
10mm 200gr WFNGC Beartooth = 1300fps/ 750 ft./lbs. - Glock 20
10mm 200gr. Controlled Exp. JHP = 1250fps/ 694ft./ lbs. - Glock 20

Double Tap's 10mm is some of the hottest stuff you can get, so it's in that 1250-1300 ballpark.

Welcome to THR.

 

[Disaster]

As I understand it, the .40Super and .45Super have thicker cases with rifle primers to handle higher pressures.

The .45 Super uses the same large pistol primer as the .45 ACP. The .45 GAP uses a smaller primer. The .45 Super has much thicker case walls than the .45 ACP and is a pretty simple conversion in any gun that has enough case support and slide weight. It just requires a heavier recoil spring.

http://www.realguns.com/archives/020.htm

 

[green country shooter]

I have some .45 super I shoot from my Glock 21 with a 6" barrel. A 230 grain bullet going 1150 fps is about all I want to shoot out of a handgun.

 

[atblis]

Huh

The .45 Super uses the same large pistol primer as the .45 ACP. The .45 GAP uses a smaller primer. The .45 Super has much thicker case walls than the .45 ACP and is a pretty simple conversion in any gun that has enough case support and slide weight. It just requires a heavier recoil spring.

According to this link
http://www.jrwhipple.com/guns/40super.html
40 Super has a small primer pocket.

 

[Disaster]

The .40 Super uses the smaller primer...as does the .45 GAP. I was referring to the .45 Super, which the OP bundled with the .40 Super. The .45 Super uses the larger primer.