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6.5x284 Throat Burner

 
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Old 05-18-2014, 11:56 AM
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6.5x284 Throat Burner

I keep seeing where some people refer to the 6.5x284 as a throat burner. Why is this? Most loads for it are around 3000 fps. Usually when you refer to a caliber as a throat burner it is pushing 4000 fps and above.
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Old 05-18-2014, 01:36 PM
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Re: 6.5x284 Throat Burner

I have had several 6.5x284s over the years. Expect 800- 1400 rds out of barrell. I had one HART barrell i shot out in 900 rds. Its depends on who much and how fast you shoot iT. In mathes with 20 shots per string of 20 minutes, it doesnt take long to burn the throat out of one! I had a bartlein that shot 1/4 moa till 1000 rds then went to 1/2 moa. Buy the time it hit 1400 rds it wad 3/4 moa. I have shot 140 vld bergers out to 1500 yards and the 6.5 bergers do very well at distance!
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Old 05-18-2014, 03:54 PM
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Re: 6.5x284 Throat Burner

Once you get past 3K fps, barrel life will show a sharper decline...Regardless of what caliber it is. Which is partially why the .308 Win lasts damn-near forever. That, and it has large bore with a small case capacity.

The smaller the bore, with the larger the case, the faster the bullet...Usually tends to burn out barrels faster than a big bore with a large case.

For example 2 calibers with the same case... 7mm RUM and .338 RUM. The .338 RUM will get significantly better barrel life over the 7mm RUM because it is #1 slower, and #2 has a larger bore diameter for the gasses to pressurize in and push the bullet down, so they're not quite as concentrated.

Yes, the 6.5-284 is a throat burner. You're talking about necking down a .284 WinMag to a smaller diameter bullet, that is faster and a smaller diameter bore for more powder to burn in... Which will equal a longer and more concentrated flame (hotter) coming out of the case onto the throat, propelling the bullet at higher speeds. No matter what caliber, if this is the scenario, it's gonna burn throats.

If you want a 6.5 caliber that's not such a bad throat burner, but gets good velocity, look into the .260 Rem Ackley Improved.
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Quote:
Originally Posted by WildRose View Post
The 284 is to the STW what a tricycle is to a Ninja.
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Old 05-18-2014, 04:56 PM
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Re: 6.5x284 Throat Burner

Correct. The 260 is a great choice. I jave a tight neck 260 with a bartlein 1-8 palma thats getting 2980 fps with 43.5 gr of rl-17. My friend has a custom 6.5x47 that also shoots 140 bergers 2900 fps. This gun has 2100 rds threw it and the gun still shoots 1/2 moa.
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Old 05-18-2014, 05:22 PM
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Re: 6.5x284 Throat Burner

I wouldn't call it a barrel burner like many other well thought of calibers often mentioned on the board. It's better than a .243, but that's nothing to be bragging about. I've known guys that got 1000 rounds out of C/M barrels, and I've also known a couple that saw less than 500 rounds out of a couple gold plated king of the hill barrels that are often regarded as the best money could buy. I Think a lot of it is how you load the rounds and the powder burn rates. Certainly it won't last nearly as long as a 6.5-06 or even sorta close to the 6.5/.257AI. Still it's a .264 bore, and just how many thousand rounds do you plan on shooting?

The 6.5-284 like the 6.5-06 is starting to get into overbore, and of course barrels suffer. The 6.5/257 is about perfect capacity wise and the 2900fps with a 140 grain bullet shows this. My only complaint is that I've seen cases dry up to un-obtanium twice in my lifetime, so I would not go for it. Still I've long felt the 6.5-284 tobe 150% better than all the 6-284's ever built.
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Old 05-19-2014, 03:49 PM
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Re: 6.5x284 Throat Burner

"a .284 WinMag" stated in an earlier post should have read "284 Win". JohnnyK.
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Old 05-20-2014, 10:29 AM
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Re: 6.5x284 Throat Burner

It's not speed that kills, it's pressure. That being said, to get more speed it takes more pressure, most of the time. There are some powders that will get the same speed with lower pressures. This will extend barrel life. A good example of this is the 6.5 SAUM or the 6.5 SS. These are wildcats designed to use low pressure powders (H1000/Retumbo) and still get decent velocity. 3200 fps with 130/140 gr bullets. Round count for the 6.5 SAUM is up there at 3000+. I don't think the 6.5 SS has been around long enough to have burned out a barrel yet.
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