.44 and .45cal covertion to (mm)

[USMCDK]

Hey guys I hope that this isn't a stir the pot kinda thing, but I haven't seen it posted yet.

I finally went to wikipedia to find out what a .45cal converts to in (mm) and came to find out that it's actually 11.43mm and the .44cal converts to 10.9mm.

So here's a question that I think will keep our minds occupied...

Which one would be safer to call it the 11mm round???

I am just curious as to what you guys think. I hope that this isn't a trollish question. :banghead:

 

[Jim Watson]

You got a USMC sig line and you want to translate calibers to French?

Most of the European calibers in the 11mm range are closer to .44, if you just must.

 

[RobertFBurnett]

1) Assuming the mentions to the Marines translate into you actually had been active duty, or currently are. Thank you for your service.

2) Mr. Watson...where did you see French in the post? Most of the known world uses the metric system, not just the French...but If I missed it nevermind. I like your Signature.

3) I'm bad at Math so I will arbitrarily say that when Jeff Coopers .46 Cal gets invented we'll just jump right to 12mm.

4) Arbitrarily choosing, I vote .45

Peace,

RFB

P.S. Not trollish...probably something I woulda thought up eventually.

 

[Wheeler44]

Hey everybody the "metric system" was officially adopted by the US a long, long time ago.. for what it's worth only the military uses it as far as I know... oh and me, I am an estimator that bids .mil work so I gotta know it.

 

[Jim Watson]

The French devised the metric system in the late 18th century and flummoxed most of the world into using it. It has been legal for trade here since 1866. If it hasn't caught on in 140 years it can't amount to much. We don't use it in daily applications, and are the only remaining superpower. Coincidence? I think not.

Now, back to the O.P.
There are several European revolver cartridges of metric designation at or near 11mm that are usually described as "comparable to .44 Russian." There are a number of European late black powder rifle cartridges with metric designation at or near 11mm that are commonly referred to here as .43 calibers, like .43 Spanish and .43 Egyptian. And since the modern .44 calibers actually measure more nearly .43", I consider that equivalent, too.

However, the few metricated users of the .45 ACP variously list it as 11.25mm (bore diameter) [Argentina] and 11.43mm (groove diameter) [Norway.]

So I guess you can have it either way, but I prefer the more historical equivalents and read .44 for 11mm. And just don't think about a 12mm at all.

 

[novaDAK]

Remember if you do the mathematical conversion, .44 is actually .429"

 

[USMCDK]

the convertion ratio or should I say variable is 25.4

for example

.45cal x 25.4 = 11.43mm

.44cal x 25.4 = 11.176mm (round up 11.18mm)

.40cal x 25.4 = 10.16mm

.38cal x 25.4 = 9.652mm (round down 9.65mm)

9mm (divide) 25.4 = .3543307 (Round up .354cal)

I hope that this helps.

BTW Robert I am former active duty of 4yrs and 2yrs inactvie reserve (Honorable Discharge) and now serve in the US Army National Guard (Don't ask)

 

[Silvanus]

Well, if the .44 is 10.9mm then that would be closer to 11mm than the .45.

But why do you care? Nobody calls them that. Not even here in Europe.

 

[Erik]

Except that as noted the ".44" isn't, and neither is the ".38."

 

[tipoc]

Jim,

If I remember correctly the U.S. is one of 5 or 6 nations that don't use the metric system. Liberia and Burma are two of them, along with a couple of Carribbean nations and I think American Samoa. It is uneven in England and some of the old British Empire (inspite of official adoption). But pretty much is used by the rest of the world.

tipoc

 

[Jackal]

Call me crazy, but I prefer the metric system. I have done a lot of work on import motocycles and the metric hardware/measurements are just easier to use. Think about it this way. When wrench sizes are labeled in a linear fashion, such as 10mm, 12mm,14mm, etc, its easier to differentiate the sizes. I personally have a hard time with our standard measuements. I just can never remember whats bigger, a 3/8 or 7/16.

 

[Cromlech]

The French devised the metric system in the late 18th century and flummoxed most of the world into using it. It has been legal for trade here since 1866. If it hasn't caught on in 140 years it can't amount to much. We don't use it in daily applications, and are the only remaining superpower. Coincidence? I think not.

I LOL'd.
Any-who, it's fair to say that 10.9 is closer to 11 than 11.43 is.

 

[oneiron]

One on line encyclopedias Says the 44 Russian is .432". Therefore it is 10/97mm. I like that round . I fire .431 bullets in my 44 Special.

 

[3pairs12]

jackal 7/16" is bigger.

 

[highorder]

OK. If you are referring to the .44 Remington Magnum, and the .45acp, the actual bullet diameters are .429" and .452", respectively. If you want a metric conversion of these dimensions, they are 10.8966mm and 11.4808mm respectively.

If you are trying to derive a metric designation for either of these rounds, your time is better spent trying to compare European and American cartridge developments in the 20th century... or something else.

Nobody calls them that. Not even here in Europe.

 

[USMCDK]

OK. If you are referring to the .44 Remington Magnum, and the .45acp, the actual bullet diameters are .429" and .452", respectively.

First I will say I always love reading something that you post to my threads highorder. Ever time you do it's almost like we are presidential candidates debating some kinda political issue and it makes me laugh.

Okay so here it goes

Second I have to ask/debate... how is the .44 a .429??? I am so darn lost over this. pm me and please explain or we can debate this here as well, it's not like it's off topic in this thread.

Third... Well there is no third I just wanted to say it

much respects guys and gals

USMCDK

 

[highorder]

The first thing you need to make peace with is the fact that actual bullet diameter has nothing to do with cartridge designation. It is a wonderfully complex subject, subject of many books dating back a few hundred years.

I don't see a comparison to a presidential debate. I see a French ex-Marine who works for Sig-Sauer in New Hampshire who has a knack for posting off the wall thoughts. I'm just trying to tie up the loose ends for the sake of continuity.

Buy this book and read it. If you're like me, it will soon be dog-eared from being constantly thumbed thru when a question comes up. A new edition is published every 3 years or so; I donate my old editions to friends who have questions like the one you posed in this thread.

http://search.barnesandnoble.com/Cartridges-of-the-World/Frank-C-Barnes/e/9780896892972

knowledge is power.

highorder~

 

[9mmepiphany]

a bullet of a .44 spl or .44 mag cartridge is a .429" bullet...just as the .38spl cartridge has a .357" bullet (that's how the .357 mag is a lenghtened .38spl)

to really confuse you, the .38-40 uses a 10mm bullet (.40")...but the "40" in it's designation doesn't refer to the calibre, it refers to the original loading of 40 grains of black powder

 

[oneiron]

9mmepiphany
just because you buy .429 bullets to shoot in your .44 does not mean that the bore specs for .44 is .429. In fact the cartridge wa designed to not conflict with the 44-40 which is .429 or the 44 American or several other .44's. Please do some research.
Can you shoot the .429 bullet in a .44 special, yes, but that does not make it a .429. The fact that I shoot .431 bullets in my .44 Special does not make it a .431 because it is a .432 by design. Check with Smith & Wesson they designed the cartridge.

 

[rcmodel]

Quibbling aside.
The fact remains that it is way closer to .429" then it is to .440"

Just as the .38 Spl. is way closer to .357" then it is to .380"

rcmodel

 

[USMCDK]

knowledge is power.

highorder~

So true and thank you for tying up the loose ends for me, I need people like that in my life, it helps alot.

BTW guys I didn't know that the bullet itself was not the actual measured item, you are tell me that the measurement specified is actually the casing???

 

[highorder]

Thanks for the kind words. Some people react differently to being swept up after...

you are tell me that the measurement specified is actually the casing???

not quite.

While bullets are measured; it is more accurate to say that the bore diameter of the barrel is measured.

Look at it this way: The .44 Remington Magnum is the "title" of a movie starring a .429" bullet. The cartridge name is one thing, the actual dimensions of the components involved are in the details. Like I suggested, get your hands on a copy of Cartridges of the World and read it thoroughly. Many of the answers you seek are in there, including the ins and outs of cartridge designation.

 

[USMCDK]

I live right near B&N in Manchester so I will go there and find that book and simmer through it. Thank you highorder and you are welcome for the kind words.

Like I said before I am the type of guy that TRYS to understnad where someone else is coming from.

 

[Jim Watson]

BTW guys I didn't know that the bullet itself was not the actual measured item,

Oh. We have more than just metric vs English here.
As said, get a copy of Cartridges of the World. It is what a researcher would call a tertiary source and is not 100% complete, but it is a good start.
Main thing to realize is not that there is not a system for cartridge nomenclature, it is that there are several and you have to know what you are looking at. Plus complications introduced by the advertising agencies making stuff up.
For example, the .218 Bee, .219 Zipper, .220 Swift, .221 Fireball, .222 Remington, .223 Remington, .224 Weatherby, and .225 Winchester ALL shoot .224" diameter bullets.
So does the .22 Varminter. But not the .22 Hi-Power.

 

[MaterDei]

Next thing you know we'll be converting grains into milligrams or worse, stone.