Ammo - Light and Fast vs. Typical loads (2100 FPS 40cal)

[hermosabeach]

https://www.theboxotruth.com/the-box-o-truth-38-rbcd-ammo-vs-the-box-o-truth/

60 grains, rated at 2010

[tabascoz28]

Makes sense. The thing about lower mass is that it slows down fast too. Also the barrel wear would be higher, it will get hotter.

Someone should spend a bunch of money and do some gel/pig meat tests on these. Then at distance.

[hermosabeach]

whoops- Out of business

https://www.youtube.com/watch?v=vSrTCrDD3-c

https://www.youtube.com/watch?v=VYxdBTBN-ZU

[M1NM]

The same thing that Weatherby has been doing with their ammo since the late 40s.

[FeuerFrei]

I still have Glaser safety slugs in my inventory and they might be comparable to the posted type here.

The GSS bullets are light and fast and they deposit energy quickly in my un-scientific testing.
Breaks bones and explodes meat that still has fluid in it, (wrapped in street clothes). There is better penetrating stuff out there.

*If I lived real close to neighbors I'd look to using them in a handgun or PCC rifle as a precautionary measure. I wouldn't load them up for edc street carry. It is too much of a niche type ammo IMO.

[billped]

Physics works both ways so it isn't as if you're getting something free here. It's not like they make the bullet half the weight and it then goes twice as fast. While awesome, it's also not possible.

There's a place for wimpy fast loads and a place for heavy slow loads, and the trade off is more than can be evaluated in a single equation.

[Robert1234]

Bet they had a cool fireball.

[ar15barrels]

The thing about lower mass is that it slows down fast too.

Really not an issue at 1-5 yards that typical handgun fights occur at.

[pacrat]

Really not an issue at 1-5 yards that typical handgun fights occur at.

^^^ASSUREDLY CORRECT^^^

Simply comparing external ballistics is never the WHOLE-HOLE story.

From wiki; https://en.wikipedia.org/wiki/9%C3%9719mm_Parabellum

8.04 g (124 gr) Norma ENVY FMJ 1,345 ft/s (410 m/s) 498 ft⋅lbf

3.9 g (60 gr) RBCD TFSP 2,010 ft/s (610 m/s) 538 ft⋅lbf

Roughly 1/2 the bullet weight. With a 40 Ft# increase. Yet mass and Ft# generated are far from the HOLE story.

Higher Velocity kills. By directly increased Hydro Static Shock Transfer creating much more tissue damage. Contained near completely in the target. Also the basic theory that Super-Vel developed their defense ammo on.

If half or so, of available velocity, and Ft # of energy, is wasted in a wall, behind the target. Because the added mass, paid for with less velocity. Caused over penetration. That tends to speak in favor of a faster, lighter, bullet designed for maximum hydro static tissue damage. That tends to reliably stay in the target.

IIRC it was Dean Grennell long ago did an article in Gun World. To prove the velocity kills point. Using lathe turned solid brass, non expanding, conical point bullets. In both 45acp and 9mm. Lowering bullet weight, and increasing velocity, incrementally. Max pressure loads. As weight went down and V went up. 40 gr in 9mm and about 60 in the 45. He got the 9mm to 2,000 fps and 45 to 1,600 fps. Testing ended with bullets getting so thin, that they could not survive firing. And were blowing up in the barrels.

ENTRY Holes got HUGE in the clay medium. By HUGE, I mean like 4 and 5" diameter entries where the hydro static shock blew back in direction of entry.

[hambam105]

When it looks good on the computer screen external ballistics become inconsequential.

PMC, circa 1990s, came out with a extremely light weight bullet for a .38 Special cartridge.
The projectile consisted the copper jacket only, no lead. Amazing this NFG concept returned.

[SkyHawk]

Underwood makes some 40SW w/100 grain Lehigh Xtreme projectiles, 1500fps.

They load the same thing in 10mm @ 1825fps, 740 ft lbs

[BrassCase]

Fast bullets burn up barrels faster too!

[I Swan]

When it looks good on the computer screen external ballistics become inconsequential.

PMC, circa 1990s, came out with a extremely light weight bullet for a .38 Special cartridge.
The projectile consisted the copper jacket only, no lead. Amazing this NFG concept returned.

PMC Ultramag. They came in 44 and 38 Special. If anyone really wants any in 44 I know a source. They are not cheap they are collectibles now. It's a tubular hollowpoint trying to do a cookie cutter type effect.

[hambam105]

And remember boys and girls...You ain't sheet unless you're using the latest and greatest sidewalk commando loads.