atblis
Member
You can actually get 180s going that fast with a 6". Probably not inside SAAMI pressures, and I'd be surprised if an ammo maker would be willing to sell that. I don't recommend doing that.
Double-Tap ammo...speed limitations and failures?
- Thread starter Patton21
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^^^You can steer the wheel of your car with your feet but that doesnt make it a good sound idea 
I know that hand loading can produce great results. My disagreement was with DoubleTaps load going 1455ft/sec. That DT 180gr load has been chrono'd over and over my users all around the country and it doesnt even come close.
I know that hand loading can produce great results. My disagreement was with DoubleTaps load going 1455ft/sec. That DT 180gr load has been chrono'd over and over my users all around the country and it doesnt even come close.
On thing I find suspicious from DoubleTap Ammo is that their .357 Sig ammunition appears to be loaded with 9mm bullets and loaded hot.
.357 SIG in 4.5" barrel:
115 Gr. GD @ 1612fps -- Seems like they are putting 9mm bullets in .357 Sig.
125 Gr. GD @ 1525fps -- Seems like the right bullet.
147 Gr. GD @ 1296fps -- Seems like they are putting 9mm bullets in .357 Sig.
Correct me if I'm wrong, but isn't a .357 Sig a 9mm bullet in a tapered .40 case?
atblis
Member
I was more so addressing this part of your post.
The issue has to do with the short neck of the 357 SIG. Certain 0.355" diameter bullets can't be loaded to the correct cartridge length, and have enough bearing surface with the neck. Basically the flat part of the bullet doesn't line up with the case neck. Now, if you're loading 357 SIG in a 10mm based gun (Glock 20 with a 357 SIG barrel), you can load longer and do some interesting things.
Thanks for your description, that makes sense.
KBintheSLC
Member
My experience with DT is in only in 10mm, and is documented here...
http://brasstard.com/2010/01/11/in-review-10mm-auto-from-doubletap/
As you can see, actual velocity is not as advertised. 200g loads advertised at 1250 fps were barely clearing 1100 fps out of the same type of gun. This is actually not a bad thing. I personally don't care for loads that exceed the specifications of the cartridge design. I just don't take advertised velocities too seriously from DT anymore as they appear a bit bloated.
...
http://brasstard.com/2010/01/11/in-review-10mm-auto-from-doubletap/
As you can see, actual velocity is not as advertised. 200g loads advertised at 1250 fps were barely clearing 1100 fps out of the same type of gun. This is actually not a bad thing. I personally don't care for loads that exceed the specifications of the cartridge design. I just don't take advertised velocities too seriously from DT anymore as they appear a bit bloated.
...
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No offense but you do not know what you are talking about. Just for reference I get 1350 fps from .40sw in my Glock 20 with a 6 inch wolf barrel and the cases look great. If you doubters would handload with 800x you would find out it is not that impossible.
The same bullet wt (180g) in 10mm gets 1450. These are at 2500ft elev. on a warm summer day at about 15 ft from the muzzle. My 45 super kimber with 5 inch barrel pushes a 185 g at 1300 fps easily...it is a blast to shoot because it shoots very flat out past 100 yds. My biggest suprise is the hot loaded 40's. In the large framed glock they hardly have any recoil compared to the 10mm loads and have almost the same velocity. The cases are packed full and seem to be very efficient in use of the available powder.
Alpha, I know the 180gr XTP @ 1455fps from a 6" tube is right.... because I get 1380 with 180gr loads from my 5" Razorback... (factory Buffalo Bore). There is NO reason you couldn't get 1455fps from a 6" tube, especially with reloads.
double tap 10mm
Hi guys my next purchase is a glock 20 10mm sf just love the high velocity
135gr 1600 fps insane 180gr 1350 fps 200gr beartooth fp 1200fps
love it i have a 1911 45 acp para ordnance 5" barrel double tap 230gr fp 1010fps
thinking of getting 185gr 1225 fps ? i read and heard that 185gr doesn't expand and penatred that well ? double tap and buffalo bore make the best ammo period
Hi guys my next purchase is a glock 20 10mm sf just love the high velocity
135gr 1600 fps insane 180gr 1350 fps 200gr beartooth fp 1200fps
love it i have a 1911 45 acp para ordnance 5" barrel double tap 230gr fp 1010fps
thinking of getting 185gr 1225 fps
? i read and heard that 185gr doesn't expand and penatred that well ? double tap and buffalo bore make the best ammo periodGuess who I found out about how good 800x is in 10mm and other hot loads for pistols. The same guy. McNett from at Double Tap before he started the company. I agree he makes great ammo. Last summer I chronoed the following handloads out of my 6 in wolf barreled glock 20. 180g, 11.0g 800x:
1449, 1422, 1434, 1452, 1454 fps. The brass was fine and pockets still tight. McNett knows what he is doing.
Caseful said:
I found out about DoubleTap on Glocktalk's Sig subforum.
People were raving (rightfully so) about the chronoed speeds they were seeing, as well as overall quality, on .357Sig DT ammo.
I seem to recall nearly 1400fps (or maybe faster?) out of a P239 barrel, which is incredible.
is it me or does 45acp 230gr 1010fps from double tap has the same spread and exp as 10mm 180gr 1350fps both are 15" over 95" i thinking of getting a glock 20 10mm because high velocity but whats the point of high velocity from 10mm like 180gr 1350fps 10mm
135gr 1600fps the same stopping power as 45acp 230gr 1010 fps 45acp 185gr 1225fps same spread and exp and there is no ballistics
i might just stick to my trusty big 1911 45 acp
135gr 1600fps the same stopping power as 45acp 230gr 1010 fps 45acp 185gr 1225fps same spread and exp and there is no ballistics
i might just stick to my trusty big 1911 45 acp
I like double tap for those shooting short barreled CCW rigs, which is darn near everyone these days. My wife carries DT ammo in her 9mm.
And I find it funny, Mike of DT actually takes guns to their SAAMI limits and people start whining that they are too powerful. Mike is only illustrating the full potential of the round in my opinion, nothing more. We've all grown accustomed to the watered down offerings and now consider them the norm. The SAAMI specs establish the norms, and most factoriy fodder does not come as close as DT to those limits.
DT establishes their velocities from real guns and lists those used. DT does not employ long barreled factory test rigs that have little to do with reality and more to do with safety (way overbuilt) and duping the customer with skewed data (longer barrels).
As for 10mm with high velocity and same terminal performance as a 45 round, try punching through a barrier and hitting your target. I bet the results will lean towards the higher velocity round. Also, the 10mm just has more range. You can shoot 135 grain bullets up to 200 grain bullets. It's just more versatile, and one of the reasons I take a shine to it myself. It's certainly not how far those guns throw their brass....oye.
jeepmor
And I find it funny, Mike of DT actually takes guns to their SAAMI limits and people start whining that they are too powerful. Mike is only illustrating the full potential of the round in my opinion, nothing more. We've all grown accustomed to the watered down offerings and now consider them the norm. The SAAMI specs establish the norms, and most factoriy fodder does not come as close as DT to those limits.
DT establishes their velocities from real guns and lists those used. DT does not employ long barreled factory test rigs that have little to do with reality and more to do with safety (way overbuilt) and duping the customer with skewed data (longer barrels).
As for 10mm with high velocity and same terminal performance as a 45 round, try punching through a barrier and hitting your target. I bet the results will lean towards the higher velocity round. Also, the 10mm just has more range. You can shoot 135 grain bullets up to 200 grain bullets. It's just more versatile, and one of the reasons I take a shine to it myself. It's certainly not how far those guns throw their brass....oye.
jeepmor
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10mm
i am not complaining on recoil or how much velocity on double tap
i carry double tap ammo my self for my 1911 45 230gr fp
the more high velocity the better 1010fps nice
10mm 230gr hardcast 1120 fps and 10mm 230gr hp 1040fps
vs
45acp 230gr hp 1010fps and 45acp 230gr fp 1010fps
very impressive 10mm 180gr hp 1350 fps vs 45acp 185gr 1225fps
that's why i might go with 10mm
i am not complaining on recoil or how much velocity on double tap
i carry double tap ammo my self for my 1911 45 230gr fp
the more high velocity the better 1010fps nice
10mm 230gr hardcast 1120 fps and 10mm 230gr hp 1040fps
vs
45acp 230gr hp 1010fps and 45acp 230gr fp 1010fps
very impressive 10mm 180gr hp 1350 fps vs 45acp 185gr 1225fps
that's why i might go with 10mm
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