Reasons for the 6mmBR, 6mmBRX, 6mmDasher, 6 x47, 6XC, .243 Win....

[Rustystud]

The 6mm BR was developed for the 100 and 200 yard game. It works well out to 600 yards. Barrel life may be as long as 4000 rounds with 15-20 reloadings. 2850 to 3000 fps.
The 6mmBRX and Dasher weree developed to give the 6BR a little more horse power without sacreficing brass and barrel life. Absolutely the best of all worlds cost, effeciency. Barrel life is between 3200 and 3600. Brass life expectancy is 15-18 reloads. 3000 to 3300 fps.
The 6mm X 47, 6mmXC give slightly more horsepower over the BRX and Dasher. But case and Barrel life begin to suffer. Barrel life is 2000 to 2500 rounds with 10-12 reloads. 3000 to 3100 fps.
The 243Win, 6mm Rem, and 6 X.284 add more horsepower with significant brass and barrel ife reductions. Barrel life is 900 1600 rounds with 10-12 reloads. 3000 to 3300fps.
Nat Lambeth

 

[k80skeet]

Nate, Very well written. I found it informational. as I never how they were in order.

 

[ecgate]

Thanks rustystud, That was very informative for me also.

 

[johara1]

I know of one 30 BR was winning with 7000 rds. down the tube, what about the PPC that only gets 1500 - 2000 rds. and the barrel goes south.....jim

 

[dmg264]

3000-3300 fps for the BRX and the Dasher and 3000-3100 for the 6x47 and XC?

I can't say that I agree with the idea that the BRX and Dasher are capable of higher velocities than the 6x47 and XC.

 

[ollie]

It all comes down to compromise. If you want a good reliable 6mm then a br will fill that need but if you want to go faster then barrel life as well as case life shorten.

 

[Rustystud]

There are several trains of thought..

But the path I want to follow in target shooting is superior accuracy at the least expense.

With hunting I want a combination of accuracy, flat shooting, bullet peformance and comfort in carring afield and shooting . With this come the loss of barrel life and more cost of components.

Every shooter has a different desired goal and differing depth of pocket book.

We live in a free country and the shooter in most cases can pick what he or she shoots.

So do your homework and pick what fits your needs best.

Nat Lambeth

 

[hardrock6]

Nate. How's the shoulder doing?

Gary from Michigan

 

[Rustystud]

Had my surgery January 21st. I am at 95% range of motion. Doing physical theraphy now. I have my fair sare of pain still and sleeping all night is not happening. I am told it will get better with time. John708 is my PT and he says I am doing much more than anyone else having the same procedure. He thinks I need to do less and let everything heal up. It is hard to be still when you are 55 with Hyper activity. Thanks for asking. I had to shoot left handed last weekend and shot a 20 shot group under .3 with two flyers at .5.
Nat

 

[spclark]

Glad everything's working out for you!

The "more vs. less" thing is a tricky line to walk; I had a heart attack (surprise!) early in 2006 at age 56 & was out shooting Palma again the weekend after they let me out of the hospital with two stents in one artery.

For a shoulder repair I'd say your PT's opinion has genuine merit, at least for the first five or six weeks when the risk of forming scar tissue outweighs the advantages of putting those repairs thru the wringer to satisfy your HAS.

 

[spclark]

Rustystud's got a good grip on the reality of those numbers.

There will be exceptions of course, dependent on individual factors with a particular rifle and shooter, but the bell curves are otherwise pretty solid.

Accepting that accuracy doesn't have to coexist exclusively with the extremes of velocity a particular cartridge is capable of will help on the barrel & case longevity end of things. Good wind reading skills will more than compensate for a couple hundred fewer FPS.

 

[Rustystud]

The reason I gave the 6BRX and Dasher more velocity then the 6XC is because brass life suffers greatly maxing out the 6XC. Tubb is a great inovater. The 6XC is a great cartrridge. The problem is the first brass was not up to preasures the shooters were putting on it. I have watched several 6XC shooters having to hammer their bolts open shooting just over 3000fps. I will say I have seen the same problem with the 6mmBRX and Dasher running at or over 3100 fps. I have shot the 6mmBRX and Dasher with 4350, VV160, and VV550 at 3300 fps. Groups and brass both suffered badly.
Nat Lambeth

 

[CanusLatransSnpr]

Very informative Nate, thanks! Been kicking around options for my next 6mm build and when I think I have my mind made up, I read something else that sways my decision for a bit ! Guess I need to just keep thinking for a while?

I had to have surgery on my right shoulder, at the ripe old age of 30, for arthritis! Although I was not limited to how much I could move my shoulder or which way I could move it, I was limited to how much I could pick up with it at first. That was difficult for me and had problems limiting myself to what I could and couldn't do. In the end I followed my PT's guidelines and made a speedy recovery and couldn't be happier still pain free over 3 years later! I assume you had rotator surgery, which requires more recovery time and more work with the PT. Hang in there Nate!

Mike

 

[bozo699]

The 6mm BR was developed for the 100 and 200 yard game. It works well out to 600 yards. Barrel life may be as long as 4000 rounds with 15-20 reloadings. 2850 to 3000 fps.
The 6mmBRX and Dasher weree developed to give the 6BR a little more horse power without sacreficing brass and barrel life. Absolutely the best of all worlds cost, effeciency. Barrel life is between 3200 and 3600. Brass life expectancy is 15-18 reloads. 3000 to 3300 fps.
The 6mm X 47, 6mmXC give slightly more horsepower over the BRX and Dasher. But case and Barrel life begin to suffer. Barrel life is 2000 to 2500 rounds with 10-12 reloads. 3000 to 3100 fps.
The 243Win, 6mm Rem, and 6 X.284 add more horsepower with significant brass and barrel ife reductions. Barrel life is 900 1600 rounds with 10-12 reloads. 3000 to 3300fps.
Nat Lambeth

Nate,
I see these questions all the time on here, how fast will this round go and what is the barrel life? You have taken the most popular ones and compiled them into one post for all to see, very informative thank you. I hope your shoulder recovery is speedy, I am having trouble just typing this right now my left rotor is totally gone, I am still working but its not easy. I am going to wait till the middle of March I think that way I can get a couple of competitions in while I am off with out taking vacation to do it. Good luck to you.
Wayne.

 

[joesr]

I have been shooting the 243 and now my 6CM for over 10 years.

I have never worn out a barrel. THINK ABOUT THAT!

I change the barrels between 3500 and 4000 rounds. My current barrel has well over 4000 rounds through it and fired a 200 with good X count in my last 600 yard match.

I'm shooting naked bullets. 115 Bergers at 3100 - 3200 fps at 600 yds and 108 Bergers at 200 and 300 yds.

The reason the 243 sized case works is because it is just large enough to allow the use of H1000 or N165. In the 22-250 sized case cartridges (6XC) you can't get enough of these slower burning powders into the cartridge to get acceptable velocity.

I’ve found that bullet velocity is not a meaningful factor in barrel wear. What appears to be the most meaningful factor is powder burning rate.

In my opinion the best 6mm cartridges are the ones with 50 to 55 grain H20 capacity. This allows the bigger bullets to be fired at over 3000 fps utilizing the H1000 burning speed, single based powders.

This has proven to give exceptional accuracy and exceptional barrel life.


Just my 2 cents worth.

Joe

 

[JohnMill]

I believe in the 243 but always hated that little short neck. Then when I read the "Turbo Point Theory", I swore to try the 243 with that adaptation. Then I got sidetracked with the 6PPC for 'bout 15 years. I've got Nate's micrometer reamer stop, Viper's video lesson, and would be chambering a 6CM right now if I could buy a reamer. I settled for a 6Super LR which I believe to be the other side of the same coin. I will, however run it by joesr's regimen and give all the credit due all of you. Whitley too.I'm just a trained monkey doing what you guys teach me to do on machines you guys design.

Thanks John

 

[Dgd6mm]

If there wasn't the 6CM, I would certainly be shooting the 6Super LR.

 

[joesr]

It was only initially that you couldn't buy a 6CM reamer.

For several years Dave Kiff has been selling the 6CM reamer to anyone. Furthermore you can by the sizing die from Redding. The die is from their custom shop and is under the name 243 Egolf Improved.

Joe

 

[Bob3700]

THe BRX or Dasher is the best bang for the buck when shooting 105-107 gr bullets. Either will run those bullets at an accuracy node just over 3000 fps on 33 gr of powder with terrific accuracy.

The XC is over kill for that bullet wt. Some bbls are hard pressed to get over 3000 fps with a 105-107 gr bullet. You are talking 38-39 gr of powder to do the same thing or less than a BRX.

The 243's are great for really hi-vel with a 105-107 and will also shoot the 115's easily over 3000 fps with good accuracy. That is one heck of a 1000 yd performer. My version is the 243 SLR because I like the flexibility of the long neck.

On the XC brass life is short when you start running the pressures up. I sort of gave up on it for LR shooting.

Bob

 

[Dgd6mm]

Good info Bob.