Author Topic: Underwood 200gr Hard Cast provided by Intercooler Nov 2017  (Read 189 times)

The_Shadow

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Underwood 200gr Hard Cast provided by Intercooler Nov 2017
« on: November 24, 2017, 01:46:36 PM »
Cartridge is from Ammo Manufacture: Underwood 200gr Hard Cast provided by Intercooler Nov 2017
Ballistics Information: 10mm Auto
Muzzle Velocity: 1250 fps
Muzzle Energy: 694 ft. lbs
Brass Make/Headstamp: Underwood - Nickel
Bullet Make/Weight/Construction/Info; Length 0.6760”/Dia. 0.4015”/ Hard Cast 200gr. HC Actual weight 198.8 / 199.4 grains 
Meplat 0.2800”: top band 0.1640”/bottom band 0.1600”/lube groove 0.1200”/nose 0.2400”
C.O.A.L.: 1.2480” / 1.2475”
Primer: Large Pistol primer Nickel color
Case: Diameter 0.4215” Crimp Diameter 0.4225” / 0.4230” Length 0.9850”
Powder Description/Positive ID/Type/Charge Weight: Power Pistol 8.4/ 8.4 grains











« Last Edit: November 24, 2017, 02:02:47 PM by The_Shadow »
The "10mm" I'm Packin', Has The Bullets Wackin', Smakin' & The Slide is Rackin' & Jackin'!
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Intercooler

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Re: Underwood 200gr Hard Cast provided by Intercooler Nov 2017
« Reply #1 on: November 24, 2017, 01:58:14 PM »
Is this the first 200 dissections? Any idea on the bullet?

The_Shadow

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Re: Underwood 200gr Hard Cast provided by Intercooler Nov 2017
« Reply #2 on: November 24, 2017, 02:05:22 PM »
Made a change to the energy figure.  :-[
Looks like the old Lyman TC, but So many molds are out there...They list it as Bullet Style: Hardcast Flat Nose 21 BHN
The "10mm" I'm Packin', Has The Bullets Wackin', Smakin' & The Slide is Rackin' & Jackin'!
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Intercooler

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Re: Underwood 200gr Hard Cast provided by Intercooler Nov 2017
« Reply #3 on: November 24, 2017, 07:21:36 PM »
In the past he used Rim Rock. I wonder if this is from them?

The_Shadow

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Re: Underwood 200gr Hard Cast provided by Intercooler Nov 2017
« Reply #4 on: November 24, 2017, 08:10:12 PM »
The Underwood bullet has a flat base and Rimrock .40/10MM 200 GR. TC " THE OUTDOORSMAN" shows a tapered base.

The "10mm" I'm Packin', Has The Bullets Wackin', Smakin' & The Slide is Rackin' & Jackin'!
NRA Life Member
Southeast, LoUiSiAna