Text only | Text with Images

10mm-Auto

10mm Ammuntion => Factory 10mm ammo => Topic started by: 4949shooter on March 07 2018 03:27:13 PM MST

Title: Does Anyone Remember this Underwood Load?
Post by: 4949shooter on March 07 2018 03:27:13 PM MST
(Sorry guys no image.) Photobucket is not cooperating. These were the 180 Gold Dots from Underwood at 1350 fps.

My buddy fired them through his Silverback and said they were FEROCIOUS.

He must have had these left over from a while back. Or Underwood sent them not realizing they are the old load.
Title: Re: Does Anyone Remember this Underwood Load?
Post by: Intercooler on March 07 2018 04:53:30 PM MST
I didn't think Underwood ever made a 180@1350 FPS?
Title: Re: Does Anyone Remember this Underwood Load?
Post by: 4949shooter on March 07 2018 07:47:22 PM MST
This is what I thought. I have a picture of the box with the velocity printed on it. Photobucket won't allow me to post pics anymore.
Title: Re: Does Anyone Remember this Underwood Load?
Post by: 4949shooter on March 07 2018 07:50:14 PM MST
http://s259.photobucket.com/user/4949shooter/media/Underwood%20Original.jpeg.html
Title: Re: Does Anyone Remember this Underwood Load?
Post by: Rojo27 on March 07 2018 08:54:49 PM MST
Oh yea, I remember those.  As I recall that was the load the TNOUTDOORS tested where the projectile ended up looking like a meteorite, where the jacket pealed way back from the velocity (but stayed intact).  I don't think TNOUTDOORS original video is still available to view but here is a similar video of clear ballistics gel test of that load.

I had a couple of those boxes I got after TN9's test came out and might still have a few rat holed away. 
Title: Re: Does Anyone Remember this Underwood Load?
Post by: The_Shadow on March 07 2018 09:44:16 PM MST
Yes there were some at 1300 - 1400 fps using IMR800X

http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-180gr-speer-gold-dot-pull-down/ (http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-180gr-speer-gold-dot-pull-down/)

I don't know why but here is what I have for a documentation with that same time frame

Cartridge is from Ammo Manufacture: Underwood 180gr Speer Gold Dot
Ballistics Information: 10mm Auto
Muzzle Velocity: 1400 fps
Muzzle Energy: 718 ft. lbs
Pictures: Before/After disassembly:
Brass Make/Headstamp: Underwood - Brass
Bullet Make/Weight/Construction/Info; Length 0.63550"/Dia. 0.4005": Speer 180gr. GD
Actual weigh 180.0 grains  Crimp Diameter 0.3950"
HP depth  HP 0.2200 / mouth 0.2415"
C.O.A.L.: 1.2520"
Primer: Brass color
Case: Diameter 0.4220" Crimp Diameter 0.4215" Length 0.9880"
Powder Description/Positive ID/Type/Charge Weight: IMR800X 9.4 grains
Picture of powder:
Tested Velocity: 1415 fps

After the Shot
Case Data: expansion measurement's: Diameter 0.4275"  primer slightly flat
Title: Re: Does Anyone Remember this Underwood Load?
Post by: sqlbullet on March 08 2018 07:27:43 AM MST
Those were from the early crazy hot Underwood days. They also had an FMJ at 1350 fps using Lovex powder.
Title: Re: Does Anyone Remember this Underwood Load?
Post by: 4949shooter on March 08 2018 12:59:28 PM MST
Those loads are screaming.
Title: Re: Does Anyone Remember this Underwood Load?
Post by: slayer61 on March 08 2018 03:07:56 PM MST
This one?
(http://i259.photobucket.com/albums/hh289/4949shooter/Underwood%20Original.jpeg)
Title: Re: Does Anyone Remember this Underwood Load?
Post by: Intercooler on March 08 2018 04:57:44 PM MST
If you want to rock your wrists buy some Fenix Ammo.
Text only | Text with Images