Lehigh Xtreme bullets

[westernrover]

They strive to meet the FBI's requirements. Not mine. The FBI's requirements are based on dogma. The same kind of dogma that brought us obsolete ideas like dogmatic point-shooting doctrines and the 40 S&W.

 

[Kleanbore]

They strive to meet the FBI's requirements. Not mine.

Alrighty then. How did you go about establishing your "requirements"?

The FBI's requirements are based on dogma.

No. They were developed using a standrad, structured, top-down requirements definition and and allocation process known as system engineering. In a nutshell, that involves

1. Establishing the mission needs--that leads to a requirement fora handgun, portable all day and operable with one hand, that will effect timely physical stops under operational conditions . Operational conditions introduce the upper limit on penetration and the barrier requirements for LEOs.
2. From those, top level performance requirements are developed. They are based on human physiological factors regarding what it takes to effect the stop, as analyzed by forensic medical experts, based on analysis and on real-world experience. They result in the minimum and maximum penetration requirements.
3. The next step is to define test and evaluation methods to support the design and qualification processes. That's where the calibrated ballistic gel and barrier specifications come in.
4. The FBI steps out of the picture temporarily. It now in industry's court. Developers will evaluate and select materials, shapes and dimensions, and manufacturing processes and perform development testing until their designs are finalized.
5. The offerors' products are submitted to laboratories selected by the FBI for evaluation, and the FBI selects products from the results and from price and availability proposals.

That's the way it works. A similar approach is employed for the selection of military rifles, artillery systems, air defense systems, communications systems--and in the civilian world for dveeloping fork-lift trucks and other material handling hardware, locomotives, ocean-going transportation, heating plants.....

There's really no other way to go about it.

 

[murf]

went out shooting a couple days ago. ran the 90 grain xd (purchased from lehigh defense) rounds through the chrony and through gallon water jugs.




the bullets averaged 1250 fps across the chrony shot in a glock 43 (my first time shooting this gun (i like it)). the bullet penetrated four jugs, dented the back of the fifth and was found in the bottom of the fifth jug. the 25 yard group (four shots counted (i pulled one)) was 3.9 inches wide and 3.8 inches tall. this is going to be a defense load for the g43.

for comparison, my reloaded 90 grain xd bullets, through my glock 19, averaged 1298 and penetrated four jugs and was found in the fifth jug (test was done a year ago). the 25 yard group (four shots counted (shot today)) was 5 inches wide and 3.4 inches tall.

i don't have a after-pic of the water jug test because i was videoing it, but the first two jugs were split top-to-bottom and the others mostly a bullet-sized hole in and out.

the ammo can be purchased here: https://shopwilsoncombat.com/Lehigh-Defense/departments/1486/



i have no ties with wilson combat, or lehigh defense,

murf

 

[Pudge]

"Wounding", as defined by the destruction of critical internal body elements, depends on penetration and upon the bullet track. Nowhere have the forensic medical people listed any other "wounding" factors as important for defensive handgun effectiveness

What then is the purpose of expansion?

 

[Kleanbore]

What then is the purpose of expansion?

I am not a forensic medical expert, but expansion became an issue after or about the time that a maximum limit was put on penetration.

Originally, they used to say, if I recall correctly, that there was no such thing as too much penetration. And in theoe days, they said that expansion could not be counted upon.