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Poll: What is a better hunting caliber the 260 Rem or the 6.5-06?
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What is a better hunting caliber the 260 Rem or the 6.5-06?

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260 Rem Vs. 6.5-06

 
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  #337  
Old 02-16-2013, 02:29 AM
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Re: 260 Rem Vs. 6.5-06

I think 6.5/06 dies are custom also aren't they.

One thing I really like about my 6.5 Cm is it's real mild shooting. I think the 260 would be similar.
But. The 6.5 06 wouldn't be bad. And it is faster.
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  #338  
Old 02-16-2013, 11:48 AM
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Re: 260 Rem Vs. 6.5-06

Quote:
Originally Posted by Cold Trigger Finger View Post
I think 6.5/06 dies are custom also aren't they.

One thing I really like about my 6.5 Cm is it's real mild shooting. I think the 260 would be similar.
But. The 6.5 06 wouldn't be bad. And it is faster.

yesterday I read an interesting blog by an F class shooter using a 6.5x57AI. His barrel was a little longer than I'd prefered, but guess he knew more about what he needed that I would have. Anyway he was pushing 140's at 2950fps while shooting 3/8th" groups (he's still developing loads for the round). Made a list of Dave Kiff reamer print numbers to choose from (all were slightly different). The one he used was a miniumum chamber design that put the .257 case in a serious crush to aid in fireforming cases. Now according to the Hornaday manual his velocities are right in there with a 6.5-06 and the 6.5/284, and at the worst only slightly slower.
gary
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  #339  
Old 02-16-2013, 12:55 PM
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Re: 260 Rem Vs. 6.5-06

I guess a lot depends on how much time a guy wants to spend making brass. . And or how competetive he wants the rifle to be. From the reports it looks like having the barrel boron nitride coated nearly doubles its like expectancy.

If I was going to do a 6.5-06 I would go A.I. some times the most accurate load is less than Max velocity and you may be able to find the sweet spot at Max 06 but less than Max A.I. vel.
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  #340  
Old 02-16-2013, 02:34 PM
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Re: 260 Rem Vs. 6.5-06

The 260 class cartridges are generally going to prefer 120-130 gr projectiles regardless of twist. You will probably need 6.5x55 AI(BJ) or larger to have a rifle that prefers 140s. 6.5-06 is sweet the AI version dies are much more expensive, but the cartridge is even sweeter. The 6.5-06 AI is near to perfect for long range hunting purposes with midsize cartridges. I've never played with the short mags, but I think magazine length will limit them.

A 6.5-270 AI would give you .050" more neck making barrel life better and brass prep significantly easier. 6.5x55 BJ AI is in a really nice niche as well, I will probably own one of these before I meet my maker.

The 6.5-06 is useably more powerful and therefore better suited for long range. Although the benefits of the 06 case won't be that evident before 800 yds and the 260 should give you a little better barrel life and the option of Lapua brass.
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  #341  
Old 02-16-2013, 03:10 PM
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Re: 260 Rem Vs. 6.5-06

Quote:
Originally Posted by jakelly View Post
The 260 class cartridges are generally going to prefer 120-130 gr projectiles regardless of twist. You will probably need 6.5x55 AI(BJ) or larger to have a rifle that prefers 140s. 6.5-06 is sweet the AI version dies are much more expensive, but the cartridge is even sweeter. The 6.5-06 AI is near to perfect for long range hunting purposes with midsize cartridges. I've never played with the short mags, but I think magazine length will limit them.

A 6.5-270 AI would give you .050" more neck making barrel life better and brass prep significantly easier. 6.5x55 BJ AI is in a really nice niche as well, I will probably own one of these before I meet my maker.

The 6.5-06 is useably more powerful and therefore better suited for long range. Although the benefits of the 06 case won't be that evident before 800 yds and the 260 should give you a little better barrel life and the option of Lapua brass.
This is why the 6.5 Sherman really shines with the 140 and up bullets. It turns it into a true longer range hunter in a 6.5. One of the guys is shooting 160's at 3050' with superb LR accuracy, but I will let him post when he is ready. Also, on the short action comment, we are in the process os developing a 6.5 Sherman Shortmag which will funtion in any short action magazine and should come very close to the 6.5 Sherman ballistics and with Norma brass to boot........Rich
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  #342  
Old 02-16-2013, 08:05 PM
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Re: 260 Rem Vs. 6.5-06

Quote:
Originally Posted by Cold Trigger Finger View Post
I guess a lot depends on how much time a guy wants to spend making brass. . And or how competetive he wants the rifle to be. From the reports it looks like having the barrel boron nitride coated nearly doubles its like expectancy.

If I was going to do a 6.5-06 I would go A.I. some times the most accurate load is less than Max velocity and you may be able to find the sweet spot at Max 06 but less than Max A.I. vel.
note:

as a rule a piece of steel that is nitrided retains it's shape and deminsions, but not always. I've seen steel grow as much as .0009", and shrink a similar amount depending upon it's chemical make up. It will add a very slight amount to the rigidity, and maybe decrease wear on the rifeling a little bit (your basicly increasing the first ten or fifteen thousandths of the bore's surface about 25 points on the Rockwell scale). I cannot see anyway it will allow the metal to withstand much more heat. I've had a lot of steel nitrided in my lifetime (all three processes), and the best jobs always came out of 4xxx C/M series steel that were cut from prehardened blanks rockwelling around 28rc to 35rc.
gary
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  #343  
Old 02-16-2013, 08:26 PM
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Re: 260 Rem Vs. 6.5-06

Quote:
Originally Posted by jakelly View Post
The 260 class cartridges are generally going to prefer 120-130 gr projectiles regardless of twist. You will probably need 6.5x55 AI(BJ) or larger to have a rifle that prefers 140s. 6.5-06 is sweet the AI version dies are much more expensive, but the cartridge is even sweeter. The 6.5-06 AI is near to perfect for long range hunting purposes with midsize cartridges. I've never played with the short mags, but I think magazine length will limit them.

A 6.5-270 AI would give you .050" more neck making barrel life better and brass prep significantly easier. 6.5x55 BJ AI is in a really nice niche as well, I will probably own one of these before I meet my maker.

The 6.5-06 is useably more powerful and therefore better suited for long range. Although the benefits of the 06 case won't be that evident before 800 yds and the 260 should give you a little better barrel life and the option of Lapua brass.
there are more than a couple 6.5x55 improves cartridge designs. The best was probably the one from Dr. Arch, and was so good that it was necked down all the way to .223 and up all the way to .308. Then there is the 7x57 necked down, or the .257 Roberts necked up (that's what the guy I posted about was using). Then there is the 6.5x57 Mauser case that was improved upon by Ackley and the AAR folks. That case is a little longer at the shoulders, but has a shorter neck length. Ackley stated that the 30-06 case necked down to .264 was a little overbore and better suited for heavier bullets. Dr. Arch's findings kinda prove this out with the 6.5x55 improved case he did (Vias did a similar one). He got 2900 fps with a 140 grain bullet using 54 grains of H450 (pretty hot?). Now the .257 Roberts case shoulders are on about .017" longer, and the guy got 50fps more velocity from a 28" barrel verses Arch's 26" barrel. The 06 shoulder length is roughly .200" longer and is good for about 150 fps maxed out using a lot more powder. Had the 6.5x57 case length been 6.5x60 I suspect the velocity would have been similar (adding .078" to the shoulder and the other to the neck length)
gary
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