Print Page - Double Tap 180gr Montana Gold JHP Pull-Down

Title: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: The_Shadow on July 31 2013 09:16:24 PM MDT

Cartridge is from Ammo Manufacture: Double Tap 180gr Montana Gold JHP (Provided by Rome)
Ballistics Information: 10mm Auto
Muzzle Velocity: 1250 fps
Muzzle Energy: 625 ft. lbs
Brass Make/Headstamp: Double Tap - Nickel
Bullet Make/Weight/Construction/Info; Length 0.6180"/Dia. 0.4000": 180gr. MG GS BJHP
HP depth 0.1230" / inside Tapered Dia. 0.0765" / mouth Dia. 0.1820"
Actual weight 180.0 grains Crimp squeezed bullet to 0.3995"
C.O.A.L.: 1.2420"
Primer: Brass color
Case: Diameter 0.4210" Crimp Diameter 0.4185" (Tight) Length 0.9875"
Powder Description/Positive ID/Type/Charge LongShot Weight: 8.6 grains
Intercooler's test results...Limited Pro 4.75" Double Tap 180gr Golden Saber 8.6gr's Long Shot Average = 1189 FPS/ 565 LBS

(https://s20.postimg.cc/hvivqhmzx/IMG_0947_zpse45f5dc6.jpg)

(https://s20.postimg.cc/n6xsb7gsd/IMG_0948_zpsa8701286.jpg)

(https://s20.postimg.cc/x48t49w3x/IMG_0949_zpsf14fb9c4.jpg)

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: Intercooler on August 01 2013 06:56:21 AM MDT

Was this one on my sheet?

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: REDLINE on August 01 2013 07:54:25 AM MDT

Quote from: The_Shadow on July 31 2013 09:16:24 PM MDTCrimp squeezed bullet to 0.3950"

That's a lot compared to what I'm used to myself. Was the bullet indented from the tight squeeze?

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: The_Shadow on August 01 2013 08:23:04 AM MDT

Quote from: Intercooler on August 01 2013 06:56:21 AM MDT
Was this one on my sheet?

No this came from Rome's package...

Redline good catch, I was using the 165 golden saber sheet as a starting point, I'll correct it to 0.3995"

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: Intercooler on August 01 2013 09:12:44 AM MDT

Looks similar to what was found in their other 180's.

Do you have a couple to chronograph?

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: The_Shadow on August 01 2013 09:22:42 AM MDT

It was only the one cartridge. :(

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: Intercooler on August 01 2013 12:33:05 PM MDT

Should be around 1220. Let me know what you get.

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: The_Shadow on August 10 2013 03:43:08 PM MDT

Updated the orginal data to add Intercooler's test results...EAA Limited Pro 4.75" Double Tap 180gr Golden Saber 8.6gr's Long Shot Average = 1189 FPS/ 565 LBS

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: RMM on August 11 2013 10:31:46 PM MDT

I wonder why DT puts such a heavy crimp on all of their 10mm loads?

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: The_Shadow on August 14 2013 05:56:50 PM MDT

I am sure he is trying to get more pressure with less powder and to provide better ignition properties, however the main reason is to eliminate "Bullet Setback" issues. Yes it can happen...think about how many people are seeing bullet jam into the feed ramps or to one side of the barrel as the cycle. Then think about constant loading and unloading of the firearm, this can also cause bullet movement. The deeper the bullet goes, the more pressure is created upon firing.

Title: Re: Double Tap 180gr Montana Gold JHP Pull-Down
Post by: Rome on August 21 2013 04:15:42 PM MDT

This was listed as a controlled expansion bullet :D

10mm-Auto

10mm Ammuntion => Factory 10mm Ammo pull-downs => Topic started by: The_Shadow on July 31 2013 09:16:24 PM MDT