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swampdonkey Rookie Member
Joined: Dec 29, 2006 Posts: 2
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Posted: Mon Mar 26, 2007 6:06 pm Post subject: lands on a 338 win mag ? |
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On a 338 win mag, model 70 winchester, what would i expect for a measurement between the lands and the grooves? In other words, what should the height of the lands be?
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Dimitri Super Member
Joined: Nov 25, 2005 Posts: 5944
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Posted: Tue Mar 27, 2007 3:44 am Post subject: Re: lands on a 338 win mag ? |
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swampdonkey,
American manufacturing standard has them at .004" hense why the .300Win Mag is called the .300 but fires a .308 caliber bullet.
British Standard (with Enfields anyways, I belive the commercial rifles may fallow German Standards) is .0055" hense why a .300 caliber Enfield fires a .311 bullet.
Dimitri
_________________ A thousand hills, but no birds in flight, ten thousand paths, with no people's tracks. A lonely boat, a straw-hatted old man, fishing alone in the cold river snow. |
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swampdonkey Rookie Member
Joined: Dec 29, 2006 Posts: 2
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Posted: Tue Mar 27, 2007 4:12 pm Post subject: Re: lands on a 338 win mag ? |
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Thanks
I measured mine to be apprx .004 inch.
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Dimitri Super Member
Joined: Nov 25, 2005 Posts: 5944
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Posted: Tue Mar 27, 2007 5:06 pm Post subject: Re: lands on a 338 win mag ? |
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swampdonkey,
Sounds good! By the way welcome to the forums hope you stay a while
Dimitri
_________________ A thousand hills, but no birds in flight, ten thousand paths, with no people's tracks. A lonely boat, a straw-hatted old man, fishing alone in the cold river snow. |
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GroovyJack Member
Joined: May 21, 2005 Posts: 621 Location: Bama
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Posted: Fri Apr 06, 2007 2:49 pm Post subject: Re: lands on a 338 win mag ? |
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So then meatree by yur reckoning why aint a 308 calt a 300 ?? Both use the same boolits .. The lands on the 338 shud be around 330 , grooves around 3375 or so , if ya wants to git teknikal ..
So meatree why aint a 270 called a 277 ?? Why is a 7mm actually 275 yet the 7mag is a 284 ( 7.21mm ) ?? Why do the dakota 330 shoot a 338 diameter ..
Meatree you opened the door son ...
_________________ My Goal In Life Is To Be As Good Of A Person As My Dog Already Thinks I Am |
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Dimitri Super Member
Joined: Nov 25, 2005 Posts: 5944
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Posted: Fri Apr 06, 2007 4:51 pm Post subject: Re: lands on a 338 win mag ? |
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Jack,
I opened no door!
I was just giving examples of how deep rifle groves should be and the "oversize" of bullets. And that comprason is used for the 30 caliber sized bullets that were issued in the militaries of the world.
A 270 Win shoots a 277 bullet you say, well what if I told you a 269 isn't as applealing in name as a simple 270 so that might be way they did it that way ??
The 7mm for example is 275, and it shoots a 284, well to me that seems like they just simply added a thou and added the 8 thou of land on it so they ended up with a even number, unless ofcourse because its a magnium they add a extra half thou to each grove.
The Dakota 330 shoots a 338 bullet because of the 4 thou per side for the groves.
But I'm not a firearms expert I just read alot and found that interesting tid bit of fact somewhere about the depth of the groves so I past it on.
Dimitri
_________________ A thousand hills, but no birds in flight, ten thousand paths, with no people's tracks. A lonely boat, a straw-hatted old man, fishing alone in the cold river snow. |
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GroovyJack Member
Joined: May 21, 2005 Posts: 621 Location: Bama
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Posted: Fri Apr 06, 2007 5:13 pm Post subject: Re: lands on a 338 win mag ? |
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A true 7mm is 275 ...
The 7 mag shoots a 284 or 7.21mm , so why it aint a 7.21 mag ( the lazz is ) ??
So why did dakota call their 338 a 330 ?? Or better yet why didnt winchester call the 338 a 330 ??
Its a matter of language usage .. And marketing as well .. And tradition as well .. The Brits normally measured from land to land , where we measure normally from groove to groove ..
Yur too easy meatree ..
_________________ My Goal In Life Is To Be As Good Of A Person As My Dog Already Thinks I Am |
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Dimitri Super Member
Joined: Nov 25, 2005 Posts: 5944
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Posted: Fri Apr 06, 2007 5:19 pm Post subject: Re: lands on a 338 win mag ? |
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Jack,
I had no idea about that.
Dimitri
_________________ A thousand hills, but no birds in flight, ten thousand paths, with no people's tracks. A lonely boat, a straw-hatted old man, fishing alone in the cold river snow. |
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GroovyJack Member
Joined: May 21, 2005 Posts: 621 Location: Bama
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jeh7mmmag Member
Joined: Dec 24, 2006 Posts: 223 Location: DFW, TX.
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Posted: Fri Apr 06, 2007 7:36 pm Post subject: Re: lands on a 338 win mag ? |
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Here is some pretty interesting stuff on caliber and terms
en.wikipedia.org/wiki/Caliber
_________________ mypva.org/
DAV
VNE USS LEX CVT-16 BLUE GHOST V2 CATS ABE-2 |
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Vince Site Admin
Joined: May 25, 2005 Posts: 15704 Location: Brisbane AUSTRALIA
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Posted: Sat Apr 07, 2007 12:46 am Post subject: Re: lands on a 338 win mag ? |
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_________________ Cheers, Vince
Illegitimi non carborundum
(Never let the bastards grind you down)
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.
"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done) |
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Bushmaster Super Member
Joined: Jun 12, 2005 Posts: 11390 Location: Ava, Missouri
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Posted: Sat Apr 07, 2007 6:16 am Post subject: Re: lands on a 338 win mag ? |
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That's O K Big "D"...And Vince is gullible....("....cause that's what it says on the box!!")
_________________ I have one nerve left and yer standin' on it...
DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote... |
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Dimitri Super Member
Joined: Nov 25, 2005 Posts: 5944
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Vince Site Admin
Joined: May 25, 2005 Posts: 15704 Location: Brisbane AUSTRALIA
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Posted: Sat Apr 07, 2007 7:26 pm Post subject: Re: lands on a 338 win mag ? |
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_________________ Cheers, Vince
Illegitimi non carborundum
(Never let the bastards grind you down)
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.
"Nulla Si Fa Senza Volonta."
(Without Commitment, Nothing Gets Done) |
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PaulS Super Member
Joined: Feb 18, 2006 Posts: 4330 Location: South-Eastern Washington - the State
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Posted: Sun Apr 08, 2007 10:49 pm Post subject: Re: lands on a 338 win mag ? |
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I have a 30-06 that shoots .30 caliber bullets and .308" diameter bullets equally well. My brother has a .308 Winchester that shoots both bullets just as well.
I guess I just learned young that 30 caliber bullets were .308 inches in diameter and that a 270 shot .277" bullets and that 243 carbine was a 6mm. Dad was an engineer and if I learned anything from him it was to look at things with a critical eye - you know look at it from all the angles so that you don't miss something. He called it "critical thinking" and I guess I caught it.
Anyway its all semantics guys - it don't matter what ya call it, just what ya feed it.
_________________ Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
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