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10mm-Auto

10mm Ammuntion => Factory 10mm Ammo pull-downs => Topic started by: The_Shadow on January 14 2015 07:37:55 PM MST

Title: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: The_Shadow on January 14 2015 07:37:55 PM MST
Cartridge is from Ammo Manufacture: Underwood 165gr Speer Gold Dot (1/14/2015) provided by Intercooler
Ballistics Information: 10mm Auto
Muzzle Velocity: 1400 fps
Muzzle Energy: 718 ft. lbs
Brass Make/Headstamp: Underwood - Brass
Bullet Make/Weight/Construction/Info; Length 0.5770"/Dia. 0.4000": Speer 165gr. GD
Actual weigh 165.4 grains  Crimp Diameter 0.3945"  (Concaved base)
HP depth  0.1800" / HP cavity 0.2150" tapered / Mouth 0.2850"
C.O.A.L.: 1.2500"
Primer: Nickle color
Case: Diameter 0.4220" Crimp Diameter 0.4220" Length 0.9860"
Powder Description/Positive ID/Type/Charge Weight: LongShot 10.8 grains

(https://s20.postimg.cc/8yg4fym4d/IMG_0345_zps0439f5ed.jpg)

(https://s20.postimg.cc/64cz2j73h/IMG_0346_zpsd1e67331.jpg)

(https://s20.postimg.cc/9nywscp8t/IMG_0347_zps62a0e04c.jpg)

(https://s20.postimg.cc/522sk0bfh/IMG_0348_zps661555cf.jpg)
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: Intercooler on January 15 2015 04:01:30 AM MST
This makes sense.

10.8gr's in this GD gave 1487 FPS
10.2gr's in the TMJ gave 1413 FPS

  These are real zingers!
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: Intercooler on January 15 2015 05:09:26 AM MST
How does that fit the loading books for Long Shot?
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: sqlbullet on January 15 2015 07:18:33 AM MST
It doesn't.  Hodgdon doesn't publish current data for Longshot in bullets less than 180 grains.  I am at work and don't have my speer book here, but handloads doesn't have a longshot listing for 165 either.
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: The_Shadow on January 15 2015 07:31:35 AM MST
When it come to loading data sqlbullet is correct about the info not being in the published data.  When it comes to Underwood's loadings, you will not find a matching book load either.  Why is that?  His loads are above the published data and that is how you see the numbers you are getting.

Just like the new loading with the LOVEX D037-01, it was also above any data by 1.5 grains over highest A#7 book loading.

Underwood stated in an e-mail that his loads were within SAAMI pressures...???
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: wadcutter on January 15 2015 11:30:22 AM MST
I find it hard to believe these are loaded under saami max pressure. Just because the gun doesn't blow up doesn't mean it's under 37,500 psi.
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: sqlbullet on January 15 2015 12:57:16 PM MST
Wade,

Do you how Underwood determines that they are within SAAMI pressures?
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: The_Shadow on January 15 2015 01:04:23 PM MST
In an e-mail I sent to them the stated that all of their ammo is inside SAAMI specs...I did post that somewhere.
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: sqlbullet on January 15 2015 01:12:10 PM MST
Yeah, I just didn't know if he said how he determines that.  It would be nice if he, and all mfg's really, would publish details testing methodology and the raw data from the results.
Title: Re: Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down
Post by: cwall64 on January 15 2015 03:44:20 PM MST
I talked to Kevin today and asked about SAAMI specs, and he reassured me that his loads are within them.  I wish I had seen this thread prior to our conversation and I would have asked!!!
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