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#6954820 - 11/10/17 05:50 PM Which 6mm caliber to build
TackDriver Online   content
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Registered: 05/02/14
Posts: 759
I have a Remington 700 in 6 mm BR that I owned for the last 20 years and seeking to have a new barrel built for it plus a McMillian A5 stock and Jewell trigger. There are new calibers in 6 mm like the 6 x 47, 6 Creedmoor, etc. It will be a target rifle mostly. Which caliber would you recommend that is more accurate and longer reaching range possibly 1,000 yards? I see that the BR is a lot smaller than the 6x47 and Creedmoor and won't have the ability to reach out and touch them. I like to use Lapua brass and what twist do you recommend? Seeking some input from you gun fanatics. Thanks


Edited by TackDriver (11/10/17 05:53 PM)

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#6954869 - 11/10/17 06:31 PM Re: Which 6mm caliber to build [Re: TackDriver]
spg Offline
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Registered: 08/11/13
Posts: 1420
.243 win

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#6954946 - 11/10/17 07:50 PM Re: Which 6mm caliber to build [Re: TackDriver]
TackDriver Online   content
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Registered: 05/02/14
Posts: 759
Noticed that Lapua do not offer brass for 6 x 47 or 6 Creedmoor, needs to be necked down from 6.5 to 6 which is a pita. Would I need to turn necks or any issues I need to look out for if I go that route?

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#6954956 - 11/10/17 07:58 PM Re: Which 6mm caliber to build [Re: TackDriver]
spg Offline
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Registered: 08/11/13
Posts: 1420
Originally Posted By: TackDriver
Noticed that Lapua do not offer brass for 6 x 47 or 6 Creedmoor, needs to be necked down from 6.5 to 6 which is a pita. Would I need to turn necks or any issues I need to look out for if I go that route?


That's the PITA i go through with my .284.

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#6954995 - 11/10/17 08:32 PM Re: Which 6mm caliber to build [Re: TackDriver]
Big Fitz Online   content
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Registered: 12/06/09
Posts: 2309
Loc: Prosper, TX
Originally Posted By: TackDriver
Noticed that Lapua do not offer brass for 6 x 47 or 6 Creedmoor, needs to be necked down from 6.5 to 6 which is a pita. Would I need to turn necks or any issues I need to look out for if I go that route?


I will be sizing Lapua 6.5 Creed brass for my 6 Creed. My understanding from some knowledgeable folks here is that neck turning will not be required.
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#6955002 - 11/10/17 08:41 PM Re: Which 6mm caliber to build [Re: Big Fitz]
spg Offline
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Registered: 08/11/13
Posts: 1420
Originally Posted By: Big Fitz
Originally Posted By: TackDriver
Noticed that Lapua do not offer brass for 6 x 47 or 6 Creedmoor, needs to be necked down from 6.5 to 6 which is a pita. Would I need to turn necks or any issues I need to look out for if I go that route?


I will be sizing Lapua 6.5 Creed brass for my 6 Creed. My understanding from some knowledgeable folks here is that neck turning will not be required.


You might experience a donut close to the case neck shoulder junction more on the neck after a few firings. Not sure since your downsizing the neck and I'm expanding 6.5 to 284. I'm sure Chad or Fireman can go more into detail.

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#6955009 - 11/10/17 08:45 PM Re: Which 6mm caliber to build [Re: TackDriver]
JJH Online   content
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Registered: 10/03/06
Posts: 3600
Loc: Katy
The important issue for you is the twist. If you are wanting a target rifle
to shoot out to 1000yds, you will want to use some of the new ultra high BC Bullets. These are long and require a faster twist than typically found.

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#6955099 - 11/10/17 10:45 PM Re: Which 6mm caliber to build [Re: TackDriver]
DStroud Offline
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Registered: 11/02/11
Posts: 1649
Loc: Waco
I have necked down a bunch of 6.5 to both 6mm and 22 Creedmoor and the only problems I have experienced was donuts while using bushing Dies. Once I got a FL Whidden die for each all the donut issues went away. I take Lapua from 6.5 to 22 in one pass and load and go hunting.
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#6955122 - 11/10/17 11:34 PM Re: Which 6mm caliber to build [Re: DStroud]
spg Offline
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Registered: 08/11/13
Posts: 1420
Originally Posted By: DStroud
I have necked down a bunch of 6.5 to both 6mm and 22 Creedmoor and the only problems I have experienced was donuts while using bushing Dies. Once I got a FL Whidden die for each all the donut issues went away. I take Lapua from 6.5 to 22 in one pass and load and go hunting.


I use whidden FL Whidden bushing die. I found out if I turn the necks before I load or on new brass they don't donut. But at first I wasn't turning the necks. After I started turning the necks I had to buy another bushing.

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#6955153 - 11/11/17 12:43 AM Re: Which 6mm caliber to build [Re: TackDriver]
kmon1 Offline
junior

Registered: 09/27/06
Posts: 22470
Loc: Texas
I neck down Lapua 243 cases to 22-243 with a FL Redding die and have not experienced the donut with those. the chamber on the 22-243 was reamed for the neck thickness of the Lapua brass being necked down.

Easiest just use 243 or 6mm Remington case with a barrel with twist rate for the hevier high BC bullets.
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#6955276 - 11/11/17 07:27 AM Re: Which 6mm caliber to build [Re: spg]
FiremanJG Offline
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Registered: 12/16/08
Posts: 22844
Loc: Wolfe City, TX
Originally Posted By: spg
.243 win


roflmao
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#6955282 - 11/11/17 07:31 AM Re: Which 6mm caliber to build [Re: TackDriver]
FiremanJG Offline
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Registered: 12/16/08
Posts: 22844
Loc: Wolfe City, TX
6mm Creedmoor brass does exist.

Give it a 1:8 and load a 115 DTAC, or a 110 gr SMK.
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#6955431 - 11/11/17 09:12 AM Re: Which 6mm caliber to build [Re: TackDriver]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7527
Loc: Wise Co.
I don't think the donut will be an issue when you neck down, it's when you neck up and a part of the old shoulder becomes the new neck.
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#6955434 - 11/11/17 09:15 AM Re: Which 6mm caliber to build [Re: TackDriver]
TackDriver Online   content
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Registered: 05/02/14
Posts: 759
What do you think about the 6 BR Ackley? I still have 200 or so pieces of BR brass.

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#6955439 - 11/11/17 09:22 AM Re: Which 6mm caliber to build [Re: TackDriver]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7527
Loc: Wise Co.
If you're asking me,, I don't think about it...but I'd say that if you like the cartridge and accept its limitations, go for it. For my part of it, going with something a little different is far more interesting then treading the beaten (and rutted) path.
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