Underwood 115gr Lehigh Defense Xtreme Penetrator (100% solid copper)

[The_Shadow]

Cartridge is from Ammo Manufacture: Underwood 115gr Lehigh Defense Xtreme Penetrator (100% solid copper)(supplied by Chucky 2 11/20/16)
Ballistics Information: 10mm Auto
Muzzle Velocity: 1700 fps
Muzzle Energy: 737 ft. lbs
Brass Make/Headstamp: Underwood - Nickel
Bullet Make/Weight/Construction/Info; Length 0.6270"/Dia. 0.3995": 115gr XP
Actual weigh 115.0 grains  Crimp Diameter 0.3995" 
4 power bands / 3 grooves 0.3645"
MEPLAT  0.2115" (wide cross)  (inner cross) 0.1175" / concaved base 0.1250"
C.O.A.L.: 1.2665"
Primer: Large Pistol Nickel color
Case: Diameter 0.4220" Crimp Diameter 0.4220" (Light Crimp)Length 0.9870"
Powder Description/Positive ID/Type/Charge Weight: Ramshot Silhouette  12.2 grains  (We saw 12.6 grains in another lot)

[Intercooler]

Interesting! So this one had .4gr's less powder. If it had 12.6 instead, that might make actual rating?

[chucky2]

Thanks for doing the pulldown!  Second on the wondering if this was loaded at the last one that was pulled down, if it'd hit advertised velocity.

[The_Shadow]

KaBoom with the UW...

https://www.thetruthaboutguns.com/2017/01/jeremy-s/rip-glock-20-kaboom/

[chucky2]

Holy crap!  I can't watch the video right now...was that my ammo or something different from Underwood?

Also, I just noticed...the thread title and OP have a type in them.  The stuff I sent isn't the Xtreme Penetrator, it's the Xtreme Defender.  The XP is 140gr, the XD is 115gr (at least at the time of this posting).

[The_Shadow]

No Chucky it was not your ammo that blew, just some other UW like it...  Bullet was undersize and had setback that led to blowout failure.