Need a fast answer for a Dumb question

Tack-243 said:
So hypothetically would you suggest a Krieger 1 in 8 for a 243 to do the job with the 115's ( I hear there a ##### to shoot correctly), even though we all know its a barrel burner. I ask only because inquiring minds want to know,and as my name inplys........I LOVE MY REMY 243.

Cheers
Bucky:sniper::bigHug:
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Look in the benchrestcental.com site in the F class forum. There was a smith and a couple of other wildcatters that 'created' options based off the 243 case.

Most were improved versions so could be even bigger then the parent 243. All used some variation on neck length to promote a theorum on bore wear.

Some report fantastic LR accuracy with match winning performance. Some report longer then expected bore life due in part to using slow burning powder and moderate pressures - maybe long necks do help?

There is absolutely nothing wrong with the case volume that is the 243. We have so many different powders that finding a good load is just a matter of testing.

Will it burn out faster then a smaller case like the 6XC/ 22-250 variants or the BR family? More then likely ALOT faster BUT speed is the only option to make 6mm keep up in the wind with the larger cals.

Until someone comes up with a higher BC bullet - absolutely no idea why this has not happened already given the ballistic rise in popularity of the 6mm in competition. One of shootings ongoing mysteries.

But this was about factory rifles and thus you are back to slow twist barrels where the 243 is grossly overbore. Again, one can play with the powders to moderate pressures and increase bore life but it may not shoot as well as full meal deal loads.

Another option worth considering is the fast twist 22-250. Savage now offers a 9 twist barrel. Pushing 75gr Amax or Bergers at a comfy 3200fps, you have flat trajectory, great in the wind, potentially very accurate, no issue going way beyond 1000yds.

Barrel life will be about as long as a 243.

YMMV.

Jerry
 
I would personally go with a 7.5" twist for 115's, although the 8" will work. I normally don't advocate over-twisting, but I also know there is a "barrier" beyond which VLD bullets just become a ##### to make work. It is nice to have a slow node that is extremely accurate, and 8" may not permit a very accurate slow node.

FYI, there is a wildcat called the 6mm "Super Long range" which involves bushing the shoulder of a 243 down to 30 degrees and in so doing, it creates a beautiful long neck. I discovered this by accident a few years when I ran a 243 case in a 6-6.5X47 die in error.

243.jpg


I always swore this would make a great cartridge, but then Robert Whitley scooped me on it and calls it a 6 super long range. I just don't like his preference for such sloppy necks.
 
MagnumPeanut said:
I seriously was going to have a 243 built and order a Kreiger 243 barrel with a 1-8 twist. I was shooting a factory 243 at the time and loved it. But alas my smith talked me into chambering it in 6mmBR and I am so glad I did.
243=good
6mmBR=EXCELLENT
:D
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I have to completely agree!
 
Or fast twist 223.

The main manf think hunting above all else and gear their products to that end.

Very few rifles, like the Savage F series, actually look at target competition as a viable market. I am sure that will change as other manf see how much market share Savage is stealing.

AND how much money they can make by slapping on an aftermarket stock :)

Jerry
 
Obtunded said:
I would personally go with a 7.5" twist for 115's, although the 8" will work. I normally don't advocate over-twisting, but I also know there is a "barrier" beyond which VLD bullets just become a ##### to make work. It is nice to have a slow node that is extremely accurate, and 8" may not permit a very accurate slow node.

FYI, there is a wildcat called the 6mm "Super Long range" which involves bushing the shoulder of a 243 down to 30 degrees and in so doing, it creates a beautiful long neck. I discovered this by accident a few years when I ran a 243 case in a 6-6.5X47 die in error.

243.jpg


I always swore this would make a great cartridge, but then Robert Whitley scooped me on it and calls it a 6 super long range. I just don't like his preference for such sloppy necks.
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I agree with Obtunded, I have been looking at the 6mm Super LR. I am strongly consider this for a short range F-Class rifle cartridge for the upcoming season.

http://www.6mmar.com/Super_LR.html

There is also a great article in the March 2010 issue of precision shooting. Unlike Robert Whitley, I would not hesitate to use Lapua brass and turn the necks and clean up the dougnuts.

Plan to work with the 115 gn Bergers, and DTAC's but will also try out Matrix 117 gn vld's. The reamer from Dave Kiff combined with the long neck of this cartridge will also allow me to try out the 105, or 108 gn 6mm bullets as well.

6mmSuperLR.jpg
 
Note his .275" neck...

He is an across-the-course shooter. They often use repeaters; I would advocate a much tighter neck for a single shot, and definitely for people who will turn their necks - a virtual necessity for long distance accuracy. 272 at the most.
 
Obtunded said:
Note his .275" neck...

He is an across-the-course shooter. They often use repeaters; I would advocate a much tighter neck for a single shot, and definitely for people who will turn their necks - a virtual necessity for long distance accuracy. 272 at the most.
Click to expand...

Point taken, however the reamer for repeaters is much different you can see it at the end of the article on 6mmAR, the body dimensions of the chamber are more generous, and the throat is shorter, to permit lighter, shorter bullets to feed from a magazine but still seat near the lands
 
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