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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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  #99  
Old 07-21-2011, 09:48 AM
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Re: 260 Rem Vs. 6.5-06

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Originally Posted by barthmonster View Post
The 6.5-284 has been an unattractive caliber to me because of big powder charges and short barrel life (reportedly ~ 1200 rounds or a bit more) and I fear the 6.5-06 might suffer the same thing. That's why for me if it was a 6.5 it would be either a 260/260AI or a larger caliber such as 7mm08/284 win/280/280AI with straight 284 Win being my favorite...

Read about the straight 284 over at 6mmbr.com they are very impressed by it..
Barrel life with the 6.5/284 is usually around 800 to 1000 rounds. The case design like most all rounds that came out of the .284 Winchester is poor. Where as the 6.5-06 has a much longer neck (about .320" verses the .270" on the .284 case if everything is perfect). The one good thing the 6.5/284 has going for it is that you can buy preformed brass that is the correct neck length. Otherwise you'd be looking at a .240" neck length; which is really bad. The 6.5-06 has been done with the standard 30-06 shoulder angle as well as 30 degrees and 40 degrees (probably others). I would think that an improved 6.5-06 case with a 30 degree shoulder would be good for well over 2000 rounds. The Ackley version will easilly do that, but presents another issue to deal with (not a big one if you can reload well). There is another 6.5 improved round that is built off the 7x57 case like the .257AI and the 6mm Remington. It will drive a 140 grain bullet too 2950 fps without a lot of trouble
gary
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  #100  
Old 07-21-2011, 11:05 AM
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Re: 260 Rem Vs. 6.5-06

Gary.....You are correct in the 6.5-06 with the sharper shoulder. My 6.5 Sherman has now fired around 1200 rounds and it holds around 5% more powder than the 6.5-06 A.I. I haven't noticed ANY decrease in accuracy at this point. The 40 degree shoulder directs the flame point INSIDE the confines of the neck rather than into the throat like a 6.5/284. I have a .300" neck on my Sherman. I firmly believe that the dynamic that takes place is very similar to directing the flame point of a cutting torch. If you have ever done any cutting with a torch, you will know what I mean. I can exceed 3200' with the 140's with a 26" barrel..........Rich
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  #101  
Old 07-21-2011, 11:27 AM
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Re: 260 Rem Vs. 6.5-06

Hi,
I meant the 260 Ackley Improved, it is much more efficient than the 6.5-06 so will give you a longer barrel life, with 6.5/284 ballistics. The bullet of choice being the 140 Berger VLD
If yo are looking at .284s just go to a 7mm mag, if you do some checking you will see that you need to go to a little heavier bullet to get the ballistics optimal. For reference you can go to the Berger Bullet website, see how high the ballistic coefficient is for the 6.5 140gr? Then look at the 7 mm 168gr BC
Both are extremely high,consequently I have built my rifles around these bullets to reach out to the longer ranges.
Whatever you do enjoy.
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  #102  
Old 07-22-2011, 10:40 AM
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Re: 260 Rem Vs. 6.5-06

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Originally Posted by elkaholic View Post
Gary.....You are correct in the 6.5-06 with the sharper shoulder. My 6.5 Sherman has now fired around 1200 rounds and it holds around 5% more powder than the 6.5-06 A.I. I haven't noticed ANY decrease in accuracy at this point. The 40 degree shoulder directs the flame point INSIDE the confines of the neck rather than into the throat like a 6.5/284. I have a .300" neck on my Sherman. I firmly believe that the dynamic that takes place is very similar to directing the flame point of a cutting torch. If you have ever done any cutting with a torch, you will know what I mean. I can exceed 3200' with the 140's with a 26" barrel..........Rich
The longer neck not only helps to hide the turbulance point from the throat (along with the sharper shoulder angle), but it also seems to guide the bullet better as it leaves the case. Now I figure some folks must have a lot of money, and no place to direct it (send me some), so they keep buying barrels. They then become enslaved to the folks keeping them afloat. But everytime you buy a new barrel blank, you enter into a new crap shoot. Will it be as good as the old one that wasn't quite as good as the first one? Or who knows maybe even better! It's not like you can over to Ed's Barrel Depot and take one for a test drive!
gary
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  #103  
Old 07-22-2011, 10:52 AM
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Re: 260 Rem Vs. 6.5-06

Quote:
Originally Posted by Terry Scott View Post
Hi,
I meant the 260 Ackley Improved, it is much more efficient than the 6.5-06 so will give you a longer barrel life, with 6.5/284 ballistics. The bullet of choice being the 140 Berger VLD
If yo are looking at .284s just go to a 7mm mag, if you do some checking you will see that you need to go to a little heavier bullet to get the ballistics optimal. For reference you can go to the Berger Bullet website, see how high the ballistic coefficient is for the 6.5 140gr? Then look at the 7 mm 168gr BC
Both are extremely high,consequently I have built my rifles around these bullets to reach out to the longer ranges.
Whatever you do enjoy.
CAD the case drawing up on the .260, and the .260AI. There's little to be gained as the .308 case is already considered an improved cartridge design. Add that plus the short neck, and you have became a gunsmith's friend! Before even considering a .260AI, I'd look at a 6.5x55 AI or a 6.5x57AI. You take the same case design that the .257AI uses and neck it up to 6.5mm, and your talking about 200+fps with a longer barrel life
gary
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  #104  
Old 07-22-2011, 11:26 AM
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Re: 260 Rem Vs. 6.5-06

Hi Gary,
With the 260 AI I'm getting 3100 FPS with the 140 Berger. Are you thinking I could improve 2oo FPS? With a 6.5-57?
It could be that the AI is a little more efficient vs the std 260, hence the improvement. I also still have some room for more powder, but it doesnt yield much improvement.
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  #105  
Old 07-22-2011, 12:24 PM
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Re: 260 Rem Vs. 6.5-06

Quote:
Originally Posted by Terry Scott View Post
Hi Gary,
With the 260 AI I'm getting 3100 FPS with the 140 Berger. Are you thinking I could improve 2oo FPS? With a 6.5-57?
It could be that the AI is a little more efficient vs the std 260, hence the improvement. I also still have some room for more powder, but it doesnt yield much improvement.
Terry......what is your barrel length?...Rich
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