10mm-Auto

10mm Ammuntion => Factory 10mm Ammo pull-downs => Topic started by: The_Shadow on July 24 2013 07:46:43 PM MDT

Title: Underwood 135gr Sierra JHP Pull-Down
Post by: The_Shadow on July 24 2013 07:46:43 PM MDT
Cartridge is from Ammo Manufacture: Underwood 135gr Sierra JHP
Ballistics Information: 10mm Auto
Muzzle Velocity: 1600 fps
Muzzle Energy: 767 ft. lbs
Brass Make/Headstamp: Underwood - Brass
Bullet Make/Weight/Construction/Info; Length 0.5025"/Dia. 0.4005": 135gr Sierra JHP
Actual weigh 135.0 grains  Crimp Diameter 0.3995"
HP depth  HP 0.1865" / HP dia. 0.1565" / mouth 0.2280"
C.O.A.L.: 1.2515"
Primer: Nickel color
Case: Diameter 0.4220" Crimp Diameter 0.4215" Length 0.9880"
Powder Description/Positive ID/Type/Charge Weight: LongShot  13.2 grains (New for Underwood)

(https://s20.postimg.cc/4rhwrix6l/IMG_0923_zpsef13c4a8.jpg)

(https://s20.postimg.cc/uaa94jogd/IMG_0924_zpse13c2240.jpg)

(https://s20.postimg.cc/pbmqq0sd9/IMG_0925_zps23261722.jpg)

(https://s20.postimg.cc/ec1jef9nx/IMG_0926_zps1c5d5111.jpg)
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: REDLINE on July 25 2013 12:33:22 AM MDT
Will you be chronoing that one?
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: Intercooler on July 25 2013 03:21:39 AM MDT
   I ran all of the ones you will find here. The info is over in factory 10mm ammo.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: REDLINE on July 26 2013 04:08:48 PM MDT
I only see one UW 135gr 10mm load which I assumed is the Nosler bullet one that's always been there, but not the load The_Shadow pulled here which uses a different powder and different bullet.  Maybe I'm blind.

Are you talking about in this document;
https://docs.google.com/spreadsheet/ccc?key=0AjsXvXEryDJjdFhsRUcwSHRUcktCMmhOMTVFa25xa1E#gid=0 (https://docs.google.com/spreadsheet/ccc?key=0AjsXvXEryDJjdFhsRUcwSHRUcktCMmhOMTVFa25xa1E#gid=0)
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: Intercooler on July 27 2013 07:50:55 AM MDT
That's David's list not mine. He hasn't tested or done anything on it in over a year.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: REDLINE on July 27 2013 11:48:12 AM MDT
Alrighty then.  Do you think you could post a link to where I'm supposedly supposed to be finding your results???

I went to your sticky.  Their were 2 links in post number 1 by you.  David's worked.  Yours didn't.  Obviously you have the link posted elsewhere?  So maybe you could go fix post number 1 in your sticky so there is no confusion?

Or how about this;  You take away stickie status from the thoroughly confusing stickie that's there.  Make a new thread with an official link to your results and then lock the thread so no new posts can be added.  It would be much simpler with no confusion.

As of right now I have no clue where to find your data.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: Intercooler on July 27 2013 03:41:07 PM MDT
The Shadow.  Can you help Redline with his requests? I'm on vacation away from a PC to do anything.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: The_Shadow on July 27 2013 04:25:01 PM MDT
I sent him a PM earlier today... 8)
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: Intercooler on July 28 2013 05:43:09 AM MDT
I fixed the Sierra info if you want to re-do the sticky.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: The_Shadow on July 28 2013 08:20:06 AM MDT
The first sticky works fine for your spreadsheet data...BTW you added the Longshot to the Sierra but also left it for the Nosler.
The original Nosler pull-down had shown IMR800X 11.8 grains.  Just thought you would like to know. :D
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: Intercooler on July 28 2013 09:25:53 AM MDT
I know. If the Nosler gets in stock it will be the same load.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: REDLINE on July 28 2013 11:01:49 AM MDT
Quote from: Intercooler on July 28 2013 09:25:53 AM MDT
I know. If the Nosler gets in stock it will be the same load.

Didn't know you were on vacation.  Hope you're enjoying yourself. 8)

The thing I was getting at is that the Sierra and Nosler bullets behind the same powder charge of the same powder will not necessarily reach the same velocity, as each bullet manufacturer may be using different copper alloys in their jackets, not to mention possibly different hardness of lead, along with possibly different lengths of bearing surfaces between the two different bullet designs.  The various frictional differences between different bullets and the same bore have some amount of potential to cause varying velocities one from another.

The_Shadow PMed me this link;
https://docs.google.com/spreadsheet/ccc?key=0Ak5OC6bPsjO8dEh6eGZ3N3hpUU13SXM5cm9pZy16T0E#gid=4 (https://docs.google.com/spreadsheet/ccc?key=0Ak5OC6bPsjO8dEh6eGZ3N3hpUU13SXM5cm9pZy16T0E#gid=4)

Is that the one you intend to be referenced for your chronograph results?
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: Intercooler on July 28 2013 11:32:56 AM MDT
That's the one.
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: REDLINE on July 28 2013 03:34:09 PM MDT
Thanks.  The_Shadow pointed out the tabs to me along the bottom.  I didn't realize they were there.  It makes much more sense now.  Great Work! 8)
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: gandog56 on July 29 2013 06:26:50 AM MDT
Cripes, I have looked at that before, and I missed those tabs on the bottom, too!
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: REDLINE on July 29 2013 12:58:06 PM MDT
Yeah.  I had never used Google Docs before, so wasn't familiar with what to look for.  Plus those tabs don't stand out at all.  It's almost like they're meant to be semi-hiding.  But, now I know. ;D
Title: Re: Underwood 135gr Sierra JHP Pull-Down
Post by: The_Shadow on September 06 2013 09:46:29 PM MDT
Cartridge is from Ammo Manufacture: Underwood 135gr Sierra JHP  (Intercooler this was done but we re-ran it)
Ballistics Information: 10mm Auto
Muzzle Velocity: 1600 fps
Muzzle Energy: 767 ft. lbs
Brass Make/Headstamp: Underwood - Brass
Bullet Make/Weight/Construction/Info; Length 0.5025"/Dia. 0.4005": 135gr Sierra JHP
Actual weigh 135.0 grains  Crimp Diameter 0.3995"
HP depth  HP 0.1895" / HP dia. 0.1590" / mouth 0.2580"
C.O.A.L.: 1.2515" / 1.2520"
Primer: Nickel color
Case: Diameter 0.4215" Crimp Diameter 0.4220" Length 0.9880"
Powder Description/Positive ID/Type/Charge Weight: LongShot  13.2 grains

(https://s20.postimg.cc/j1rh2snr1/IMG_0077_zpse8bb67ba.jpg)

(https://s20.postimg.cc/6adawalot/IMG_0078_zps9cce60f4.jpg)

(https://s20.postimg.cc/3t1jp19i5/IMG_0079_zps9dc61f10.jpg)