270 Win or 300 Win Mag

[Shane Lindsey]

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

 

[royinidaho]

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....

 

[Shane Lindsey]

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

 

[royinidaho]

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.

 

[Nomosendero]

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.

 

[Shane Lindsey]

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...

 

[Nomosendero]

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.

 

[FEENIX]

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...

Since your from Commifornia, don't overlook the Hornady GMX on both calibers.