Author Topic: 270 or 30-06?  (Read 2602 times)

Offline westcoastal

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Re: 270 or 30-06?
« Reply #15 on: 04 Sep 2011 - 23:03:53 »
thats kinda what i was getting at ... i only have 2 inches difference at 200 yards between the 100g and the 140 ... with groups under 3/4 in ... consistancy is why i chose the 270
i cant get that out of my pre 64 mod 70 in 06 , they both sport 2-7 vari x 2's
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Offline Jackal

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Re: 270 or 30-06?
« Reply #16 on: 05 Sep 2011 - 13:24:20 »
I'd say the 06.
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Offline MxdAzn9

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Re: 270 or 30-06?
« Reply #17 on: 06 Sep 2011 - 04:06:47 »
I got to shoot both this weekend (Bruno .270/Rem. 30-06).  I like both rounds but I'm partial to 06. 
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Offline ajole

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Re: 270 or 30-06?
« Reply #18 on: 08 Sep 2011 - 14:03:13 »
Why does everyone compare a 180 grain 30-06 against a 130 grain .270, and then say the .270 is flat shooting? ::)

You throw a 130 grain bullet into a 30-06 and it will shoot flat too.

The 30-06 has more bullet choices, and can shoot anything the .270 can, and more.
The .270 can kill anything you can hunt in the US.

Get what you want, they are both great.  The 30-06 is just better! :D
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Offline CamoDeafie

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Re: 270 or 30-06?
« Reply #19 on: 08 Sep 2011 - 14:11:45 »
Why does everyone compare a 180 grain 30-06 against a 130 grain .270, and then say the .270 is flat shooting? ::)

You throw a 130 grain bullet into a 30-06 and it will shoot flat too.

The 30-06 has more bullet choices, and can shoot anything the .270 can, and more.
The .270 can kill anything you can hunt in the US.

Get what you want, they are both great.  The 30-06 is just better! :D
agreed; and i dont think they have 220 grain .270..
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Offline RG_86

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Re: 270 or 30-06?
« Reply #20 on: 09 Sep 2011 - 01:32:22 »
Why does everyone compare a 180 grain 30-06 against a 130 grain .270, and then say the .270 is flat shooting? ::)

You throw a 130 grain bullet into a 30-06 and it will shoot flat too.

close but no cigar it has to do with B.C. of the diameter of the round. basically gravity pulls harder on the .308 then it does on a .277 bullet. because of the amount of surface space. not much but enough to make a difference. just about all .308 bullets in standard twist with factory ammo have a range zero of about 125 yards. the .270 typically has a range zero of about 175 yards. unless I am mistaken. I am very tired and have worked way too much this week. If i am wrong I am sure someone will come along and correct me. either way just go with what ever makes you happy. I like the .270 cause it doubles as a varmint/predator gun. load up some light 90-110gr bullets and destroy coyotes. load it heavy and get everything else. then again the 06 is great as well that is my go to weapon for hunting up here. basically the choice is up to you.
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Offline ajole

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Re: 270 or 30-06?
« Reply #21 on: 09 Sep 2011 - 07:19:49 »
close but no cigar it has to do with B.C. of the diameter of the round. basically gravity pulls harder on the .308 then it does on a .277 bullet. because of the amount of surface space. not much but enough to make a difference. just about all .308 bullets in standard twist with factory ammo have a range zero of about 125 yards. the .270 typically has a range zero of about 175 yards. unless I am mistaken. I am very tired and have worked way too much this week. If i am wrong I am sure someone will come along and correct me.

Mostly right, but it doesn't make my statement wrong.  The BC has more to do with weight/mass vs surface area, so the shape is more important to BC than the weight/mass, and gravity hasn't anything to do with it, really; check Galileo's experiment off the Leaning Tower of Pisa to show that weight/mass does not change how fast things fall, unless their shape starts catching air .  The .270, being smaller diameter, is longer than the .308 for the same weight, making it essentially more streamlined.  That slight advantage is less important at heavier bullet weights, though.

I agree, the .270 is theoretically "flatter" shooting.  But the 30-06 isn't exactly shooting rainbow trajectories either, and can be zeroed where you want it to be, and shoot POI at the POA about as far out as most people should be allowed to shoot.  The reality is, they shoot very close to the same trajectory at most hunting ranges.

Here is an example...close to the same weight, zeroed at 200 meters.  Essentially the same trajectory and energy out to 500 meters with 160 grains.

.270 160 Gr. Nosler Partition    +1.74 / 2646 / 2331    +0.00 / 2451 / 2000    -7.52 / 2266 / 1710    -21.79 / 2091 / 1456    -44.09 / 1926 / 1235
30-06 165 Gr. Nosler Partition  +1.70 / 2667 / 2605    +0.00 / 2445 / 2190    -7.51 / 2237 / 1833    -21.97 / 2041 / 1526    -44.83 / 1858 / 1264

The lighter 130 grain gives the .270 a slight advantage, but the chart was using a Boat tail for the .270, and not for the 30-06.

.270   130 Gr.  BTSP    +1.38 / 2857 / 2356    +0.00 / 2625 / 1989    -6.46 / 2406 / 1670    -18.89 / 2199 / 1396    -38.52 / 2005 / 1161
30-06  130 Gr. SP    +1.38 / 2860 / 2361    +0.00 / 2542 / 1865    -6.79 / 2248 / 1458    -20.49 / 1978 / 1129    -43.11 / 1733 / 866

So you see why I laugh a little when people start talking about how much flatter the .270 is; when they are essentially the same.  I mean, the difference in drop is less than most people can group at a given range.  The gun and shooter are FAR more important to how well the round shoots, than the caliber. 
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Offline Jackal

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Re: 270 or 30-06?
« Reply #22 on: 09 Sep 2011 - 17:15:56 »
What would happen if you hunted varmints with the 06 other than vaporize them lol? If you just want the nuisance gone I don't see an issue. If you want the meat I guess that's another issue. I don't have any small caliber hunting rifles. A Mauser 8mm, a Mosin 91/30 and that M77 Hawkeye in 06 when I get it off of layaway. The M77 is a lefty so I'm gonna LOVE that.
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Offline RG_86

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Re: 270 or 30-06?
« Reply #23 on: 09 Sep 2011 - 21:12:15 »
What would happen if you hunted varmints with the 06 other than vaporize them lol? If you just want the nuisance gone I don't see an issue. If you want the meat I guess that's another issue. I don't have any small caliber hunting rifles. A Mauser 8mm, a Mosin 91/30 and that M77 Hawkeye in 06 when I get it off of layaway. The M77 is a lefty so I'm gonna LOVE that.

Not the meat it is the pelt they are after.
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Offline RG_86

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Re: 270 or 30-06?
« Reply #24 on: 09 Sep 2011 - 21:13:53 »
AJOLE I will give you credit however this is kinda like the 308vs 30-06 argument we could sit here and debate it all night, but in the end it doesn't really matter nice job on the charts by the way.
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Offline Jackal

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Re: 270 or 30-06?
« Reply #25 on: 10 Sep 2011 - 13:59:28 »
What would happen if you hunted varmints with the 06 other than vaporize them lol? If you just want the nuisance gone I don't see an issue. If you want the meat I guess that's another issue. I don't have any small caliber hunting rifles. A Mauser 8mm, a Mosin 91/30 and that M77 Hawkeye in 06 when I get it off of layaway. The M77 is a lefty so I'm gonna LOVE that.

Not the meat it is the pelt they are after.

Oh... well then. I got nothin' lol
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Offline CamoDeafie

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Re: 270 or 30-06?
« Reply #26 on: 10 Sep 2011 - 14:09:08 »
a 55 grain sabot Accelerator in the 30-06 will take care of the varmints at 3500ish fps :D
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Offline ajole

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Re: 270 or 30-06?
« Reply #27 on: 10 Sep 2011 - 17:11:20 »
AJOLE I will give you credit however this is kinda like the 308vs 30-06 argument we could sit here and debate it all night, but in the end it doesn't really matter nice job on the charts by the way.

Thanks! :D


That's exactly my point...it doesn't matter, they are essentially the same.  But people always argue that the .270 is flatter shooting event though it absolutely isn't; or that the 30-06 makes bigger wound channels, or something. ::)  It's my pet peeve. :-[

The only REAL difference is that you can get heavier bullets in 30-06.  Which makes a really useful difference to about one tenth of one percent of the people in the world who shoot hunting rifles. :D

Which by the way, is probably about the same thing that happens when you compare .308 and 30-06.  The smaller case probably has a harder time with heavier bullets, I'd guess?
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Offline CamoDeafie

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Re: 270 or 30-06?
« Reply #28 on: 10 Sep 2011 - 17:18:48 »
as a starting one-rifle guy; I chose the 30-06 simply on availability of ammo, variety of ammo, and the fact that I wanted something that could hit large targets at decent long ranges....say 500 yards or so...lol. and it was relatively cheap to get compared to "Battle Rifles" when one considers the ammo costs as well. 308 is more expensive by a few dollars per 20rd boxes versus the 30-06, the 270's 2 dollars per box more than the 30-06 but that is if its 130 grain, if heavier, add a dollar per 20rd box up to 27 per 20rd box of 180gr ...and then the rifles chambered in 270 were slightly more expensive by 30 to 50 dollars compared to the 30-06s I've found...so boiling down, I chose the 30-06 because it fit my needs and I know the ammo for it is available in pretty much every store that sells ammo; unlike some calibers...and I am not 100% sure if the 270 is just as widely available; but eventually I would like a .223 or 22-250 for the light medium range duty and varminting duty if i can't get my paws on 135-140 gr varmint rounds for 30-06 lol. 
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Offline RG_86

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Re: 270 or 30-06?
« Reply #29 on: 10 Sep 2011 - 22:58:58 »
but eventually I would like a .223 or 22-250 for the light medium range duty and varminting duty if i can't get my paws on 135-140 gr varmint rounds for 30-06 lol. 

You can load em yourself but the problem is still going to be there with the 06 or the 270 on the impact of the bullet creating a huge hole, if you can find some solid bullets in this weight range that would be ideal. that or learn to sew real nice like....lol
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