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Old 01-09-2014, 09:16 PM   #21
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Every time you fire a round, damage is being done. The hotter it is, the more damage. There is really no line in there to determine exactly what velocities are 'too' hot.

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Old 01-09-2014, 09:58 PM   #22
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If you look at load data, as I am right now, Nosler No4, you see that Max loads in .243 are not the most accurate in their findings. It is a 60/40 split Low to High.
With an 85gr partition using IMR4064, which I use for other calibers more then any other powder, you are at 2800fps. So how does that translate into down range performance. I'll also toss in 4350 at 2900fps for comparison.
Both are minimum loads and the most accurate for the powder.

2800fps Nosler partition
500 yards -67" or 12.75 moa, or 51 clicks on a 1/4" scope
2900fps Nosler partition
500 yards -61.5" or 11.75 moa, or 47 clicks on a 1/4" scope.

Difference in energy is minimal, 35FPE separating them.

4064 takes 5.5gr less, but is 100fps slower.
7000gr per pound x5.5gr means you get 35 more cartridges w/ 4064.

So is a slower burning Powder going to cause more or less throat erosion?

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Old 01-10-2014, 12:39 AM   #23
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Quote:
Originally Posted by AlotOfPayne View Post
Axxe I get all that I was just curious is to what it takes to damage the throat ill probably just be using the rifle for target and coyote hunting out to 500 max
the answer is, there isn't a definitive answer to your question. i think you want a particular number of rounds. well i don't think anyone can tell you that.

it might be 3000 rounds or more, or even 1000 and less.
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Old 01-10-2014, 12:40 AM   #24
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Lol my question was answered by sniper30 earlier thanks though

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Old 01-10-2014, 01:05 AM   #25
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Quote:
Originally Posted by AlotOfPayne View Post
What's too hot to run through the barrel 4000 fps and up?
Good question.

Being as your rifle is a bolt action I wouldn't think you will ever or rarely have to worry about heat damage to the barrel from hot rounds. Semi or automatics yes...but not a bolt action.
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Old 01-10-2014, 01:30 AM   #26
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Quote:
Originally Posted by wittmeba View Post
Good question.

Being as your rifle is a bolt action I wouldn't think you will ever or rarely have to worry about heat damage to the barrel from hot rounds. Semi or automatics yes...but not a bolt action.
the biggest danger is from increased throat erosion from shooting very hot and fast rounds.
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Old 01-10-2014, 01:45 AM   #27
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IME, all the "load data" blar blar blar means nothing as far as

what kind of damage you are going to do with your particular

rifle with a specific load.

Now, go to some private land, start shooting wooden crates,

or solid targets, maybe 2by6s or 2x10s.

When you see what does the best damage to a

solid target, or maybe gallon jugs filled with water,

then you know the approximate damage the proper

weight bullet is going to do at the proper twist rate

to a wild animal.

With wood or other solids, pay particular attention to the

exit cavities, as the entrance will generally be the same

small hole.

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Old 01-10-2014, 01:47 AM   #28
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Quote:
Originally Posted by AlotOfPayne View Post
Axxe I get all that I was just curious is to what it takes to damage the throat ill probably just be using the rifle for target and coyote hunting out to 500 max
Your kinda putting the cart before the horse.
If your shooting factory ammo,you won't come close to shooting 4K fps,and you'd probably have blown primers in a handloaded cartridge before you get that fast.

Shooting a rifle with a hot barrel does more damage to the throat than shooting a hot rod load,although shooting hot loads will damage a throat faster than shooting a normally charged load.
If you are planning on handloading for your rifle,and use the listed data in any reliable reloading manual,you have little to worry about damaging the barrel of your gun for several thousand shots.
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Old 01-10-2014, 02:48 AM   #29
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For a 243 with a 1 in 9.25 barrel twist and muzzle velocity above 2,800 FPS:

The Greenhill formula figures you should keep the bullet length below 1.15"

The Berger stability formula figures you should keep the bullet length below 1.10"


This is pretty good agreement and should allow you to use most all 100 grain bullets and lighter.

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