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Opinions wanted, or facts...About 6.5x284 or 260 barrel life

 
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Old 12-23-2011, 07:54 PM
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Opinions wanted, or facts...About 6.5x284 or 260 barrel life

Looking for some insight on the difference between these two.

It seems like most guys run the 140s in the 6.5x284 at 3000 FPS+. Guys complain about the short barrel life. If a shooter was going to drop the velocity to 2800 FPS, would he see a significant increase in barrel life?

On the flip side, it seems that the same speed out of the 260 is easily attainable but it seems that running 140s in a 260 at 2800 is a high pressure load? Am I wrong here?

All that said, if you drop pressure on the 6.5x284 and increase the pressure in a 260 to reach the same velocity, which do you think will offer better barrel life and why/why not?

Will a 3 groove barrel increase life a bit or am I going to run into other problems suing the 3 groove such as bullet disitegration?

I would be more than happy running 140s at 2800 but would like to do it optmizing barrel life. I'm stuck on either the 260 or the 6.5x284.

As always, thanks.

M
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Old 12-23-2011, 09:16 PM
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Re: Opinions wanted, or facts...About 6.5x284 or 260 barrel life

I'm no metallurgist but from what I've read here on the forum, the 6.5X284 is a barrel burner. The fastest load in the Hogdon manual for 140gr. bullet in the 260 is 2730 fps.
I'm not saying that you can't get 2800 fps out of the 260 but you'll probably be above the SAMMI specs. If you really have to get to 2800 fps, the 6.5X284 is your best bet.
The 6.5-06 with a 140gr. bullet will get you to 2800 fps also.
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Old 12-23-2011, 09:31 PM
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Re: Opinions wanted, or facts...About 6.5x284 or 260 barrel life

I think the amount of powder and bore size have the biggest effect on throat erosion. I have heard about people shooting out a 6.5x284 barrel in f class competition in 8-900 rounds. I shoot with a gentleman that was shooting a 260AI. His barrel went about 1000-1100 rounds before it went crazy. I personally would be more concerned about with action I had to use as opposed to which one will last longer. Back to your original question, it would probably depend on the shooter and the barrel. Theoretically, the lower pressure round might last longer. BTW, most loads that I have found to be very accurate are usally on the upper end of the cartridge capacity.
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Old 12-23-2011, 09:39 PM
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Re: Opinions wanted, or facts...About 6.5x284 or 260 barrel life

I have been waiting to hear more real life results from the guys who are doing nitride treatments on their barrels. I have heard several say they are having it done but can't find squat on how well it works? Would you consider doing this? Sorry I can't help answer your question but like you I was considering building a 6.5-284 but don't like burning up barrels. After hearing about nitride treating the barrel I thought it just might be worth considering.
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Old 12-24-2011, 05:45 AM
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Re: Opinions wanted, or facts...About 6.5x284 or 260 barrel life

My 260 that i shoot in long range matches has 1350 rounds fired and after my last match i measured the throat and it has only grew .015". I did not look at it with a borescope but the barrel does not copper foul at all and accuracy is still the same as when it was new. I believe it will last another season or more. The load i use is 308 lapua brass necked down,wolf large rifle primer,47grs. imr7828ssc and a 140gr. a-max at 2780 fps with no high pressure signs. I may be wrong but i believe the slower burning powders increase barrel life.
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Old 12-24-2011, 07:53 AM
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Re: Opinions wanted, or facts...About 6.5x284 or 260 barrel life

The rate that a barrel burns out is largely a function of the amount of powder burned in relation to the bore size. Given the same bore, and the same shooting conditions, a 260 will give you 50-100% longer life. If you go to the "Accurate Shooter Forum" there is formula that takes about five factors you plug in and calculates barrel life. I'd be cautious about making choices about big game hunting cartridges based on general comments, particularly that the 6.5x284 is a barrel burner. It is no more of a barrel burner than most of the magnums used for effective long range hunting on this forum. It is actually better than some. The 6,5x284 earned the reputation as a barrel burner with the Benchrest and Target shooters. Life is 800-1100 rounds for the kind of shooting they do. They run very hot. It is generally compared to rounds that use substantially less powder, but also produce more wind drift, a key factor. The reason the target shooters use it is that it gives the lowest recoil, for the superior ballistic performance. The big trade off is that you usually don't want to change a barrel in the middle of the shooting season. Also keep in mind that they measure barrel wear in tenths of an inch group size at 100 yards. I use a 260 for my target shooting and a 6.5x284 for hunting. I can assure you that the barrel will be changed in my 260 long before the barrel gets changed in my 6.5x284. I shoot 1000+ rounds/ year in the 260, less than 100 with my 6.5x284 hunting rifle, and it never gets hot. The big difference is that whatever my 260 can do on game at 700 yards, my 6,5x284 can do at 1000.
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Old 12-24-2011, 08:54 AM
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Re: Opinions wanted, or facts...About 6.5x284 or 260 barrel life

Grayfox, your explaination makes waayy too much sense to post on an internet forum!
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