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Old 12-22-2005, 10:24   #51
Tang419
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Re: 4.5" barrel - 1525fps ?

Quote:
Originally posted by kidcoltoutlaw
4.5" barrel - 1525fps . Now that is fast has anybody run a chronograph on it to see if it will realy do that ?

Yes, SPCWES has, only I think he was getting 1550.
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Old 12-22-2005, 11:04   #52
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Quote:
Originally posted by Tang419
www.doubletapammo.com

the 700 #ers was from a G35 though.


Caliber : .357 Sig
Bullet : 125gr. Gold Dot JHP

3.5" (G33) barrel - 1415fps / 556 ft. lbs
4.0" (G32) barrel - 1450fps / 584 ft. lbs
4.5" (G31) barrel - 1525fps / 645 ft. lbs
5.32" (G35) - 1594fps / 705 ft. lbs

Estimating here, it seems they gain on average of 40-50fps per 1/2" of barrel added.
6.02" (G24) - 1644fps / 750 ft. lbs
Tang 419, you are correct in your post about the official glock specs, however, have you actually tried these velocities to be true in the real guns?

IŽll give you my doubts--measure the length of your glock 31 barrel from the top tip of the chamber to the end, youŽll get the 4.49". But, that is NOT effective barrel length, you must discount the chamber portion which is about 820 thousandŽs less. So you get 3.67" of effective barrel length.
Now meassure the length of a SW 2.5" snubie .357 magnum and youŽll get the 2.5" from the cylinder end meets the barrel. That is advertised so and effectively so.

When ammo manufacturers publish their data they use barrel lengths but we never know exactly how effectively those barrels meet the length criteria. I have rarely been able to get the published 1150 FPS out of my golden sabers out of my G22, and Remington says they use a 4" barrel. It would be great to know the velocities out of the guns themselves.
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Old 01-25-2006, 16:39   #53
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Quote:
Originally posted by Glockbuster
Tang 419, you are correct in your post about the official glock specs, however, have you actually tried these velocities to be true in the real guns?

IŽll give you my doubts--measure the length of your glock 31 barrel from the top tip of the chamber to the end, youŽll get the 4.49". But, that is NOT effective barrel length, you must discount the chamber portion which is about 820 thousandŽs less. So you get 3.67" of effective barrel length.
Now meassure the length of a SW 2.5" snubie .357 magnum and youŽll get the 2.5" from the cylinder end meets the barrel. That is advertised so and effectively so.

When ammo manufacturers publish their data they use barrel lengths but we never know exactly how effectively those barrels meet the length criteria. I have rarely been able to get the published 1150 FPS out of my golden sabers out of my G22, and Remington says they use a 4" barrel. It would be great to know the velocities out of the guns themselves.
Not sure I'm buying the idea that you need to disregard the chamber length when calculating barrel lengths. The chamber forms part of the "combustion" chamber of the barrel, you are getting the benefit of the empty cartridge case in contributing to the length of the barrel.

I'll concede that there's a delta between how revolver barrels are measured vs semi-auto's, but the chamber area is definitely part of the volume where powder burning occurs.
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Old 01-27-2006, 10:37   #54
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Quote:
Originally posted by Glockbuster
Tang 419, you are correct in your post about the official glock specs, however, have you actually tried these velocities to be true in the real guns?

Your doubts leak a lot of water. I haven't used them, but the G35 finding was done by Fatdog earlier in this topic. The other 3 specs are from Mike Mcnett's site www.doubletapammo.com . Feel free to go there and dispute him, but most find his numbers are on the conservitive side. Spcwes was getting 1550 from his G31, slightly better than the advertised numbers. The one I said "estimating" on, I was estimating, just for fun. Now that one was a guess of numbers, with avergaes.

3.5" (G33) barrel - 1415fps / 556 ft. lbs
4.0" (G32) barrel - 1450fps / 584 ft. lbs
4.5" (G31) barrel - 1525fps / 645 ft. lbs
5.32" (G35) - 1594fps / 705 ft. lbs
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Old 01-28-2006, 09:51   #55
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Quote:
Originally posted by Tang419
Your doubts leak a lot of water. I haven't used them, but the G35 finding was done by Fatdog earlier in this topic. The other 3 specs are from Mike Mcnett's site www.doubletapammo.com . Feel free to go there and dispute him, but most find his numbers are on the conservitive side. Spcwes was getting 1550 from his G31, slightly better than the advertised numbers. The one I said "estimating" on, I was estimating, just for fun. Now that one was a guess of numbers, with avergaes.

3.5" (G33) barrel - 1415fps / 556 ft. lbs
4.0" (G32) barrel - 1450fps / 584 ft. lbs
4.5" (G31) barrel - 1525fps / 645 ft. lbs
5.32" (G35) - 1594fps / 705 ft. lbs
No flames intended Tang419, I was just asking if the velocities were out of the guns themselves since I thought I read barrel length, not actual gun. IŽll never doubt your word or spcwes data or Mike Mcnetts, if you guys say so I believe it. I was just trying to learn more since I do not have access to his fabulous ammo being overseas.
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Old 01-28-2006, 22:04   #56
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Quote:
Originally posted by Glockbuster
No flames intended Tang419, I was just asking if the velocities were out of the guns themselves since I thought I read barrel length, not actual gun. IŽll never doubt your word or spcwes data or Mike Mcnetts, if you guys say so I believe it. I was just trying to learn more since I do not have access to his fabulous ammo being overseas.

I wasnt flaming either, sorry if it seemed that way. Just letting you know those were tested velocites.
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Old 03-12-2006, 12:47   #57
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Quote:
Originally posted by Donut Gestapo
Double Tap:
3.5" barrel - 1415fps
4.5" barrel - 1525fps

Speer:
4.0" barrel - 1350fps

Both have the same Gold Dot Bullet
Anyone have any numbers for Pen/Exp/Pressure?
These are the numbers that would matter to me not speed.
Thanks
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Old 03-21-2006, 14:16   #58
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formula to calculate energy

Hello fellas,

I have an easy to use formula which will calculate the energy at any point for which you have a velocity. It works for every case when you know the bullet wt and velocity.

Example: 230 gr at 950 fps.(your basic +P .45ACP)

divide the mass (grains) and the velocity by 100

this gives us 2.3 and 9.5

So mass x velocity x velocity x constant = lb-ft energy

From the above: 2.3 x 9.5 x 9.5 x 2.22 = 461 (rounded off)

This works for every single bullet you can think of.
Remember 7000 grains = 1 pound and you can even calculate artillery and such.Don't worry about the constant. Just know it works!

Good day mates,
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Old 04-20-2006, 14:28   #59
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147g 357 SIG DT

And range/chrono reports on the 147g 357 SIG Doubletap loads?
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Old 04-29-2006, 15:14   #60
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List on page one updated to include: Wagner Acuswage - 125g - TMJ. I put an ** next to the ones which are no longer produced but may be found on someone's dusty old shelf....
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Old 06-30-2006, 06:42   #61
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List on page one updated to include:
Corbon DPX- 125g - DPX
Corbon Pow'R Ball - 100gr - PB
Corbon BeeSafe - 91g - BS

This is a little bit of a departure as I have never included the "exotic" rounds like Glaser before or any of the "clean" rounds but.... what the hey! I'm getting to the end of the list ( Of course I have thought that many times before!! )
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Old 09-06-2006, 17:23   #62
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List on page one updated to include Collins Cartridge Company - 125g - FMJ
That's the 50th load I've gotten!!!!! And there are more out there yet!
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Old 09-07-2006, 17:46   #63
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List on page one updated to include
Reed's Ammunition & Research - 124g - Gold Sabre !!!!
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Old 10-12-2006, 07:26   #64
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List on page one updated to include.....

DFA - 85g - Nylon ( lead free )!! If anyone is interested, this guy: DFA
is selling them at a good price and he's very good to work with!!
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Old 12-12-2006, 22:37   #65
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Just found this thread, hey fellow Sig lovers

The only thing ever shot out of my G33 has been Speer GDHP's. I found a great deal at a gunshow and grabbed a bunch of it.

Now even with this standard round, my Angry Cricket is snappy...what's everyone think about the DT stuff in terms of recoil? The muzzle velo out of a 3.5 barrel is downright impressive and I'm going to get some to try, but I'll have to admit...

I'm skerred!
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Old 02-16-2007, 01:39   #66
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Can't believe no one has replied to this.

The DT is top notch. I use it exclusively in 357 Sig and 10mm. Great product and the best CS you will find.

Enjoy!!
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Old 04-03-2007, 18:44   #67
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I got 1578 fps with DT 125 gr gold dot in my G31. Are the 125 gr gold dots being loaded in nickel cases now or still in brass?
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Old 06-19-2007, 06:49   #68
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List on page one updated to include:

22.) Fiocchi - 124g - FMJ
53.) Winchester - WinClean - 125g - BEB

There's still more out there but - I only add it to the list if I have actually had my hot little hands on it!!!
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Old 07-18-2007, 10:53   #69
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Quote:
Originally posted by CATATOMIC
I got 1578 fps with DT 125 gr gold dot in my G31. Are the 125 gr gold dots being loaded in nickel cases now or still in brass?
I am new to this part of Glock talk. Just switched my G27 to a G33 and was amazed at the power and accuracy of the .357 out of this weapon. Now a confirmed .357sig carrier.

The order I just received was Winchester Brass. Wish he had the Nickle.
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Old 10-13-2007, 21:13   #70
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Finally got some time to test the 147Gr Double Tap 357SIG. This stuff looks good, Gold Dot bullet and new Winchester brass. The bullet has a very heavy taper crimp.

First test Glock 31 (4.5" bbl)
10 rds
AV speed 1171 fps
SD = 9.21
for comparison I have 125gr Gold Dot from Georgia Arms
(just to make sure my chrony was reading normal... it was)
10 rds
AV speed 1437 fps
SD = 8.30

Second test Sig P239 (3.6" bbl)
10 rds
AV speed 1089 fps
SD 8.06
GA stuff for comp.
10 rds
AV speed 1335 fps
SD = 10.14

1) The DT 147Gr is the softest shooting 357SIG I have ever shot!
2) In my P239 it tore the center out of a 3" bull @ 25 yds, off the bench.
3) Yes it was slower than rated speed but I still like it!
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Old 10-23-2007, 10:14   #71
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List on page one updated to read:

23.) Extreme Shock - 90g - FFJHP
28.) Glaser - Silver - 80g - Safety Slug
37.) Magsafe Ammo,inc. - 64g - Defender

I was supposed to have one more to add but they didn't get my order exactly correct....
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Old 10-26-2007, 07:30   #72
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Quote:
Originally Posted by Luvbeer30 View Post
Finally got some time to test the 147Gr Double Tap 357SIG. This stuff looks good, Gold Dot bullet and new Winchester brass. The bullet has a very heavy taper crimp.

First test Glock 31 (4.5" bbl)
10 rds
AV speed 1171 fps
SD = 9.21
for comparison I have 125gr Gold Dot from Georgia Arms
(just to make sure my chrony was reading normal... it was)
10 rds
AV speed 1437 fps
SD = 8.30

Second test Sig P239 (3.6" bbl)
10 rds
AV speed 1089 fps
SD 8.06
GA stuff for comp.
10 rds
AV speed 1335 fps
SD = 10.14

1) The DT 147Gr is the softest shooting 357SIG I have ever shot!
2) In my P239 it tore the center out of a 3" bull @ 25 yds, off the bench.
3) Yes it was slower than rated speed but I still like it!
Those #'s are WAY below what DT advertises. 70fps below what they claim from a 4" barrel out of a 4.5" tube. Also, all the DT I have shot (about 5k rds.) have been packed in starline. How old were the 147's you tested?
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Old 10-26-2007, 15:49   #73
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List on page one updated to read:

24.) Extreme Shock - 124g - FFJHP

Kudos to Cheaper Than Dirt for corrrecting my order quickly and professionally!!

List up to 63.... I can reach 70!!!
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Old 10-26-2007, 19:05   #74
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Here's some Miwall reloads to add to your list,NitLion...

http://www.outdoormarksman.com/index...filter_id=2239
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Old 10-27-2007, 09:43   #75
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Kirkcdl,

Thanks! They had a single box of 50 left out west so hopefully, it's on it's way to me now. Should have bought more but want to get a case from Precision Cartridge Company next. Also found a couple of oher possibilities doing some web surfing:

Quality Cartridge

and

Custom Cartridge
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