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6x284 or 6BR

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Old 05-10-2007, 08:23 PM
Platinum Member
Join Date: Jul 2005
Posts: 1,651
6x284 or 6BR

Hey guys, I know most of you already know about my new project. I am debating between the 6x284 or 6BR. I would like to get some opinions about which one I should go with. Here are some facts for you all to consider when giving your advice. Thanks in advance, as I value all of your opinions.

1. This is going to be a Low Volume Shooting long range rifle, so I am not worried about barrel life.

2. Longest shots will be shooting out to a 1000 yards.

3. I want to use the Lapua 105grn Silver Scenar (Moly Coated) and maybe the occasional 87grn V-max.

4. Barrel will be Krieger, 30", 1-8.5 twist, with brake. Krieger recommended this twist rate when using the 6x284.

5. Rifle will weigh 32 pounds.

6. I would like to shoot the 105grn bullets at around 3200 to 3300fps to maximize the BC. I know this favors the 6x284. The 6BR will push the 105grn bullets at around 2900fps, so I know the 6x284 has the advantage over the 6BR in this department. However, is the extra 300 to 400fps worth it?

7. I don't want to Improve the 6BR case to get the extra velocity if I go with the 6BR.

8. The varmints, I will be shooting at, are small California ground Squirrels.

The rifle is going to be very heavy and stable, here is a list of the some of the components;
1. Nesika Model L, 1.700 Diameter Action.
2. Krieger, 30", 1-8.5 twist, 1.450 straight cylinder.
3. McMillan Tooley MBR, 5 Pounds lead added to rear.
4. Jewel trigger.
5. Vais Muzzle Brake.

I apologize for listing the components again. Some have made fun of me for updating you all on the componenets. However, because of the question I am asking, I wanted to list the components in hopes it would help those who will answer the question.

I've been reading some really good thing about the 6BR, so I am thinking maybe using it might be the way to go. However, I would like to hear what you guys have to say.


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Old 05-10-2007, 08:49 PM
Gold Member
Join Date: Jan 2006
Location: Nebraska
Posts: 507
Re: 6x284 or 6BR

You could split the difference and go with a 243 Win and Lapua brass or 6mmX47 Lapua. Given the choices I'd pefer the 6BR .272 no-turn neck, just a personal preference. With the 243 you would also have the emergency option of , shudder.... factory ammo (can't believe I actually typed that).
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Old 05-10-2007, 10:12 PM
Platinum Member
Join Date: Sep 2004
Location: on the rifle range in Utah
Posts: 2,723
Re: 6x284 or 6BR

I know you probably don't want to hear what my take is on it again and you probably won't listen to it anyway but I will say it once more. SPEED AINT EVERYTHING! In fact, it ain't even second or third in the criteria of what I look for. ACCURACY FIRST AND FOREMOST. BALLISTIC COEFFICIENT IS SECOND. CASE DESIGN IS THIRD. Then and only then, does speed come into the equation and I never want blazing speed, just sufficient speed to launch high bc bullets into the smallest group possible. Remember, a bullet flying faster than it's design spec might actually <font color="red"> degrade </font> bc and thus make it less accurate and harder to hit your target.

The 6-284 has the capability to push bullets faster than what they might like.

The 6br is very forgiving, gives uniform velocities with just about every load you feed it, and is deadly accurate by nature.

So to answer your question:
I would like to shoot the 105grn bullets at around 3200 to 3300fps to maximize the BC. I know this favors the 6x284. The 6BR will push the 105grn bullets at around 2900fps, so I know the 6x284 has the advantage over the 6BR in this department. However, is the extra 300 to 400fps worth it?

[/ QUOTE ]

No. It is not worth it. If you want to cut your wind drift more, launch a higher bc bullet (larger caliber) instead of just throwing another 300 fps behind the same 6mm bullet.
Find it
Range it
Click it
Pull it
Dump it

If it's not far, it's boring.
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Old 05-10-2007, 11:20 PM
Join Date: Jun 2007
Location: Wyoming
Posts: 2,676
Re: 6x284 or 6BR

For 1k and below:
6BR, 243 Win, or 6mmX47 Lapua will all work.
All listed are capable.

In the near future I am going to being playing with a fast twist 223 Contender handgun using 75 &amp; 80 gr. A-Max's for out to 1k attempts.
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Old 05-11-2007, 06:28 AM
Silver Member
Join Date: Nov 2005
Location: Texas
Posts: 226
Re: 6x284 or 6BR

I beleive I would look hard at James suggestion, the lapua 6x47. I really don't know a heck of alot about it but I do know its getting pretty popular at various matches. Its worth a little research anyway. I beleive that the 6mmbr site has some information on it.
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Old 05-11-2007, 07:50 AM
Join Date: Nov 2004
Location: El Reno, OK
Posts: 1,503
Re: 6x284 or 6BR

I would go with the 243 win. It would give you a little more velo than the 6br but not be the fire breather the 6x284 is. The 6x47 sure is gettin alot of press, I got a guy here in town getting one built so pretty soon we will have some first hand knowledge.

Steve Elmenhorst
Third Generation Shooting Supply
"Products for shooters, by shooters"
monday-friday 8:30-5:30 CST
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Old 05-11-2007, 10:35 AM
Gold Member
Join Date: Oct 2004
Location: Northamptonshire England
Posts: 676
Re: 6x284 or 6BR

243 Ackley or 6mm Rem Ackley, perfect for your needs.

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