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300WIN Velocity

 
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  #8  
Old 07-02-2012, 09:04 AM
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Re: 300WIN Velocity

Take a look at Reloader 25, shooting a 200gr smk out of prepped win brass, 215M primers
getting 3010 - 3040fps with a 24.5 barrel which is a Steyr rifle SBS Hunter....
Goes subsonic around 1700 yards, and the BC is just about the same for the 200gr SGK
which all come up data work for hunting at long range shots 500-700 yards....
just my .......... .02
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  #9  
Old 07-02-2012, 04:08 PM
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Re: 300WIN Velocity

Quote:
Originally Posted by backwoods83 View Post
Yep, horrible harmonics unless you have a 1.250" straight tube.
Why will it have horrible harmonics?

Whatever the barrel's resonant frequency is, its harmonics and resonant frequency will be identical for every shot fired with the same load. Only their amplitude will vary with how hot the load is, but the frequency and direction will be exactly the same for each and every shot.

Why? The barrel has the same shape and metalurgy for every shot fired; it doesn't change. And heat doesn't change that until the barrel melts into a liquid.
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  #10  
Old 07-02-2012, 04:17 PM
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Re: 300WIN Velocity

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Originally Posted by Long Time Long Ranger View Post
Just depends on the barrel. Some are fast, some are slow and some are average. I have one incredible 300 winchester shooting a 180 grain bullet over 3300 fps with a listed loading manual load and no pressure, crazy.
Becha the peak pressure's well over SAAMI max.
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  #11  
Old 07-02-2012, 04:49 PM
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Re: 300WIN Velocity

I am aware the harmonics will be the same, damn is everyone a freaking rocket scientist, just because they are idental from shot to shot doesn't mean $hit, bad harmarnic resonance is bad harmonic resonance, and it takes far less things around to effect it, especially if the diameter is decreasing as it gets longer. I wonder why pencil barrel walk up again?
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  #12  
Old 07-02-2012, 06:08 PM
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Re: 300WIN Velocity

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Originally Posted by backwoods83 View Post
I am aware the harmonics will be the same, damn is everyone a freaking rocket scientist, just because they are idental from shot to shot doesn't mean $hit, bad harmarnic resonance is bad harmonic resonance, and it takes far less things around to effect it, especially if the diameter is decreasing as it gets longer. I wonder why pencil barrel walk up again?
I guess I don't know what "bad harmonic resonance" is, so please explain. I ain't no rocket scientist, but knowing that a given barrel whips, vibrates, wiggles, exactly the same way for each shot for a given load is good enough for me and mechanical engineers working in vibration analysis professions. And lots of competitive shooters feel the same way. If they didn't wiggle the same for each shot, they wouldn't shoot very accurate.

I've never had a problem with any barrel, regardless of weight, taper or shape, walking up or any other directions. They've all shot to point of aim within 3/10ths MOA through 1000 yards going from ambient temperature for 20 to 30 shots fired 20 to 30 seconds apart.
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  #13  
Old 07-02-2012, 06:19 PM
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Re: 300WIN Velocity

And no, since I expected a smart ***** reply, a given piece of metal does not react the same every time after a certain length. Go ahead, get a 4ft barrel that tapers from 1.25 to .675" and see how it acts, I'll still se shooting with my buddys and all of our 3-400 26-30" barrels instead of arguing with you.
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  #14  
Old 07-02-2012, 06:19 PM
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Re: 300WIN Velocity

Quote:
Originally Posted by Long Time Long Ranger View Post
Just depends on the barrel. Some are fast, some are slow and some are average. I have one incredible 300 winchester shooting a 180 grain bullet over 3300 fps with a listed loading manual load and no pressure, crazy.
I've only seen one 300 win that will come anywhere near that speed on a 180. That was a ruger #1 with a 26" barrel running compressed charges of retumbo. It bucked like a mule too.
3150 fps is about it with a 180 in 24-26" barrels. You might get another 100-150 fps at 30", but only if your powder is slow enough to take advantage of the length. You need to look at the book velocity as a speed limit also, and if you are significantly over on speed without a longer than usual barrel to add some of it, you are over pressure.
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