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)
(https://s20.postimg.cc/884fuvvml/IMG_0089_zpsirnswmvk.jpg)
(https://s20.postimg.cc/vmcf6tszh/IMG_0090_zpsgzibkdn4.jpg)
(https://s20.postimg.cc/u7aui3zm5/IMG_0091_zpsff6fh1jr.jpg)
(https://s20.postimg.cc/pleq9rlst/IMG_0092_zpsb3hxpxub.jpg)
Interesting! So this one had .4gr's less powder. If it had 12.6 instead, that might make actual rating?
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.
KaBoom with the UW...
https://www.thetruthaboutguns.com/2017/01/jeremy-s/rip-glock-20-kaboom/ (https://www.thetruthaboutguns.com/2017/01/jeremy-s/rip-glock-20-kaboom/)
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).
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.