Follow

It amazes me that a 10mm Luger bullet (middle) has about 50% MORE energy than the significantly larger .45 colt long (right).

For reference on tbe left is a 9mm parabellum.

ยท ยท 8 ยท 2 ยท 2

@freemo The FBI used 10mm and it had excessive recoil problems and they had issues, so they approached S&W to create something new, S&W made them the .40 cal which is just a 10 mm but with a shorter case.

But recently, maybe a couple of years ago, the FBI did a use of force study, and they discovered that the best carry for accuracy of initial shots and accuracy of follow-up shots is actually 9 mm so they switched over to 9's.

Thanks for listening to my TED talk

@rchrd Yup, all accurate.

But its important to note what works best for the mean is not the same as what is best for the individual.

If you must apply a standard for everyone, find the best in mean and go with it... but if you dont need to then find what is best for the person, regardless of the mean.. I have no doubt 10mm is the superior shot for some people (perhaps those better at handling recoil) and not the superior shot for others.

@rchrd @freemo
The accuracy of the FBI sucks, anyhow.
But that's a problem of the chain of command of the agents wielding the weapons.

@freemo
Nice collectors' items of limited practical use
(specialization is for insects).

But how do they compare to a laser capable of emitting a beam of pure anti-matter?

@freemo It's a 10mm Auto. Georg Luger only designed the 9mm.

@gat No you have it mixed up...

9mm is parabellum, 10mm is Luger... its 45 that comes in Auto and Colt Long varieties, here we have Cold Long.

@gat

Ok seems you are right, thank you... 9mm is either luger or parabellum (which appear to be the same thing)... 10mm is auto, and .45 is either Auto or Colt Long whicha re different things.

@freemo Correct, although the story is a little more involved in detail.

For the rimless .45, the Colt's original name was ".45 ACP" (Automatic Colt Pistol). The Colt's competitors tended to stamp their guns with ".45 Auto".

For the revolver .45, Colt's original name was ".45 Colt". However, since other revolver calibers had "Long" in the name, users of the cartridge called it ".45 Long Colt" and basically overcame factory's opinion. In part it helped to disambiguate it from .45 ACP.

There's no point in knowing any of this.

@freemo

You donโ€™t even know what Georg Luger did you faggot

@freemo 45 Colt loads are designed to replicate its original black powder performance, a hot modern load would basically be a 454 Casull

@scathach I can tell you from shooting them it builds up a much thicker and harder to clean residue, thats for sure

@scathach 45 colt is ok to shoot, but i find their mostly in revolvers and i dont find many revolvers to be very ergonomic. So they tend to hurt your hand ifyou shoot it too much, not to mention being a pain to clean.

A 10mm has 50% more energy but, at least in my gun, is much smoother to shoot. I'd say for handguns 10mm and 9mm will cover you well enough... if you really want a variety a 45 ACP is nice, as is the 5.7mm

@freemo the difference is from technological advances in metallurgy and the change from black powder to modern smokeless powders

Modern ammunition designs just don't need anywhere near the same amount of case capacity to generate the same amount (or more) energy.

The .38 vs 9mm is a good example as they have roughly the same diameter bullet but the 9mm has almost ~30% more energy despite being ~30% shorter overall.

@drewfer @freemo I'm interested to know what the metallurgy is about here. Do you have a link to something?

@SteelFolk @drewfer

He is probably talking about copper jackets. Back in the cowboy days they were just lead slugs.

@freemo @drewfer Oh, the brass bit? I read that barrels on big ship guns suffered from fatigue to due to hoop stress and didn't last long so I though it might be about something similar.

@SteelFolk @drewfer

There is probably all sorts of crazy mettalurgy at play in the bullets of big guns.

Then there are barrels too. Today the barrel of a gun is much stronger and as such our bullets can produce much higher pressures.

@freemo @drewfer I can see that you'd feel silly if the barrel got wider after a few shots, the gases got past it and the bullet just plopped out onto the floor.

@freemo @SteelFolk

It's more about the casing, chamber, and barrel of the gun itself, not the bullet.

The Army's most recent iteration of the standard issue rifle (SIG Spear) has a specially designed steel & brass case to help handle the overall pressures that the propellant generates. My understanding is that the new bi-metal construction was needed to ramp up the bullet performance but keep it within the pre-existing overall cartridge length requirements.

Info: en.wikipedia.org/wiki/.277_Fur

@drewfer @freemo Yes, cartridge brass (aka 70/30 or alpha) is great for forming into tubes but isn't very strong.

Sign in to participate in the conversation
Qoto Mastodon

QOTO: Question Others to Teach Ourselves
An inclusive, Academic Freedom, instance
All cultures welcome.
Hate speech and harassment strictly forbidden.