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270 Win or 300 Win Mag

 
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  #1  
Old 07-17-2012, 07:34 PM
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270 Win or 300 Win Mag

Greetings,
I am asking for advice (or find fault in my data please). New to long range hunting, not shooting, paper and flesh are obviously different.
I used one of the ballistics programs I found online (JBM?) or maybe even here to get this data.
270 Win w/ Berger 150 Gr or 300 WM w/ 180 Gr TSX? (Moderate loads, not working anything too hot).
Based on the data below, I don't see much difference in the energy at the various ranges.
Actually as you get further down range the .30 cal starts to drop off below the .277!!!??? I don't get it. Neither one is very impressive out pased 600 yrds.
I understand that a bigger 30 cal bullet will give more energy, but will it buck the wind enough to be worth the change to a heavier bullet?
Any advice would be appreciated. TSX was chosen as I live in the Communist state of California and some areas are trying to protect the birds...

270 Win w/ 150 Berger
Rg in yds/KE- 400/1495
500/1297
600/1121
700/966
800/830
900/713
1000/614

300 WM w/ 180 TSX
400/1668
500/1402
600/1173
700/978
800/815
900/682
1000/578

Thanks,
Shane

Last edited by Shane Lindsey; 07-17-2012 at 07:41 PM. Reason: Formatting/readability
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  #2  
Old 07-17-2012, 08:24 PM
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Location: Blackfoot, Idaho
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Re: 270 Win or 300 Win Mag

Your data is most probably good. JBM is pretty much a standard.

For LRH the 270 Win will never compete with the 300 win. Note that I am a die hard addicted 270 Win shooter and still say this.

The LRH tendency is to maximize performance of any given cartridge.

The 270 cal bullet will have a higher ballistic coefficient that a same weight 30 cal.

A 150 class bullet is about as heavy as a 270 goes. Though Matrix offers a great 165 class bullet it is a bit heavy for the winnie.

Several bullet makers indicate that minimum velocity for their bullet to perform correctly is ~1800 FPS which tends to set the maximum distance for the bullet.

Stuff a 210/220/240 class bullet in the 300 and you can effectively reach out and touch about anything you wish.

This is were wind bucking capability shows its worth.


my 2 cents....
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  #3  
Old 07-17-2012, 08:51 PM
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Re: 270 Win or 300 Win Mag

Thanks for imput.

I tried the Matrix 165's and the rifle wouldn't shoot them. I thought I had the best of both worlds with that one, but didn't stabilize.

Shane
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  #4  
Old 07-17-2012, 09:02 PM
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Re: 270 Win or 300 Win Mag

So you have the 270 Win. . . Good.

Find a 140 class bullet allowed by your gestapo, stoke it up as much as you can and maintain accuracy and within 'unreasonbable' pressure limits. I get 3200 FPS out of mine w/RL 22 with no pressure signs and great accuracy. I'm figuring it good for deer and down out to as far as I can hit 'em and under 550 or so for elk, though I don't take it for elk any longer. The moose @ 60 yards was dead, kind of slowly, but still dead.
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Old 07-17-2012, 09:21 PM
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Location: Pocahontas, AR
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Re: 270 Win or 300 Win Mag

I don't understand comparing the 270 cal. Berger with a 180 TSX, but it did remind of when I was a kid reading O'Connor & he would compare a hot loaded 130 Gr. spitzer load in a 270 with a blunt tip factory Core lokt in a 7RM & then say the 270 was almost as flat.
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Old 07-17-2012, 09:31 PM
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Re: 270 Win or 300 Win Mag

I have a 270 Sendero, that I have good dope and confidence for out to 800 and change.

I also have a factory Ruger M77 in 300 WM. I really like this, but it just isn't like the Sendero.
Both have their trade offs, but accuracy is everything...
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  #7  
Old 07-17-2012, 10:12 PM
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Re: 270 Win or 300 Win Mag

Yes the Senderos are nice, I have one in 300WM & a 25-06AI. A 270 Sendero would be a good & rare find.

Your 2 rifles are apples & oranges also, just as compariong these very different bullets.

Difficult to do, to compare I would use comparable bullets & rifles.
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