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240 Sierra Match King

 
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  #1  
Old 09-13-2008, 09:49 PM
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240 Sierra Match King

Anybody using the 240 Match King in a 30 cal for long range hunting?


What rifle?
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  #2  
Old 09-13-2008, 10:36 PM
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Re: 240 Sierra Match King

Quite a few of us do. 300 Ultra, 300 Tomahawk, the 338 Lapua necked down to .308 variants. Whatever can toss 'em.

There is no other bullet in my 300 Ultra that I can develop as much energy with as the 240 (4800 ft. lbs at the muzzle--in my rifle, the AB 200 at 3200 can't do that, 210 Berger at 3150 can't do that) and with highest BC in its class in commonly available bullets, it holds that energy farther out there than anything else--in 'commonly available' bullets, that is.
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Old 09-14-2008, 06:04 AM
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Re: 240 Sierra Match King

jmden,

Last time I checked, if you bring the 300 rum to top load with factory length barrels, for both the 210 and the 240, at long ranges the 210 would be whipping the 240 in just about everything. I'll have to check again.
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  #4  
Old 09-14-2008, 10:25 AM
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Re: 240 Sierra Match King

Hi Eaglet,

We've exchanged load info before, but I don't recall yours. Load a 240 into your program at 3005 fps and you'll get around 4800 ft. lbs. of energy. ( Edit: I'm on my 6th or 7th load on these cases at the moment with 104.5 g US869 and the 240 right on the lands (Wyatt's mag box) and I'm down to 19 cases out of the orignial 28. Still holding primers, but decided this time around to use the Hart tool to help hold the primers better.) This is out of my stock 26" barrel. What speed does the 210 have to be going to top 4800 ft. lbs. as the muzzle? Exbal shows that it takes about 3210 fps with the Berger to top 4800 ft. lbs. of energy. Are folks shooting the Berger 210 at 3210 fps in stock 300 RUM 26" barrels? That seems a bit high to me. Even if they match energy at the muzzle, the Berger is losing that energy faster than the 240, right?
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In the beginning God created the heavens and the earth. Genesis 1:1

"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God?" Thomas Jefferson - Notes on the State of Virginia

www.wildsidesystems.com - Shelter for Your WildSide - http://www.youtube.com/watch?v=tYwgo...&feature=g-upl

Last edited by jmden; 09-14-2008 at 11:43 AM.
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  #5  
Old 09-14-2008, 04:08 PM
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Re: 240 Sierra Match King

Actually you can get about 3000 fps in a 30-378 which also translates to about 5100 ft lbs of energy. In spite of all its hassles, the 30-378 is a heck of a cartridge particularly with longer barrels than normal but using speciality powders such as retumbo, you can push the envelop quite a bit in a standard barrel.
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  #6  
Old 09-14-2008, 06:37 PM
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Re: 240 Sierra Match King

jmden

I believe he is meaning at LR the 210's have more energy, not muzzle energy. Whats muzzle energy got to do with anything really?? Dont think theres to many animals shot at the end of the barrel...

If you can get a 240g SMK going 3000fps in a stock 26" bbl, 3200fps should be about max for a 210g in a 26" stock bbl. Hard to believe your getting 3000fps from a 240g IMO. However its probly because your using US869. If you were to use that with 210's, I'm sure you could reach 3200fps.

Not knocking the 240g SMK or your load by any means BTW. I haven't run the numbers in quite a while (couple years since I had my 300 RUM) to verify actually which is better ballistically at LR, so I cant say for sure which out performs which. I might give it a quick gander though to see for myself.

My stock 26" 300 RUM liked the 210's at a slow 3000fps. Thats where the accuracy was. I could push them to 3100 with H-1000 but not as good accuracy. I'm sure with Retumbo or US869, I could've reached 3200fps, but would probly be a warm load.
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  #7  
Old 09-14-2008, 06:48 PM
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Re: 240 Sierra Match King

Plugged in the numbers 240 at 3K, and 210 at 3200.

The 210 shoots flatter obviously by 2 ft at 1K when both zeroed at 100 yards. Windage is 1" difference at 1K which is nothing. I dont think anybody can judge wind to within 1" at 1K to make that a deciding factor. Even at 1500 yards, the diffrence in wind is only 5", which again, I doubt anybody can accurately judge 5" at 1500 yards to make that a deciding factor once again.

The 210 retains more velocity out to 1475 yards, where at 1500 the 240 finally surpasses it by a whole 2fps.

The energy difference at 1500 is only about 140 ft lbs in favor of the 240.

So if you ask me, its pretty dang even between the 2. I would shoot whichever is most accurate and not worry about anything else. They'll both do what you ask of them.
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