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270 Win vs. 7mm-08

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Dino67 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dino67 Quote  Post ReplyReply Direct Link To This Post Posted: April/11/2012 at 16:52
I have a Browning X-Bolt in 7mm-08.
 
Using Reloder 17 and Hornady 162gr Amax, Lapua 260rem cases expanded up to 7mm I'm getting 2800fps.  I won't give the charge but I've worked up the load starting at 43 gr while checking case head expansion and primers for signs of pressure.  The load I ended up with is over book max.
 
I've just started working loads for the Berger 140gr VLD's and so far i've seen 3000fps.  My best groups with the Bergers have come with them seated a long way off the lands.
 
Both loads will put 5 under .5" at 100yards.
 
There are a much larger selection of high BC projectiles in 7mm.
 
The 7mm-08 doesn't have the boiler room to push the 180gr's.  I'm in the process of building up a longe range precision rifle and may chamber it in 284 win.  I hope to be able to launch 180gr Bergers at 2800fps.
 
Why do I need a 270 ?
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Dyelynn View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dyelynn Quote  Post ReplyReply Direct Link To This Post Posted: April/13/2012 at 10:21
Originally posted by Bitterroot Bulls Bitterroot Bulls wrote:

Originally posted by Dyelynn Dyelynn wrote:

i was under the impression that the 308 and 30.06 had nearly the same case capacity, and thus, nearly the same potential for recoil and velocity.  if the velocities are nearly identical than the only other factor in down-range energy will be the bullet's weight and shape.  if the shapes are the same (ie. both barne's ttsx or nosler ab, ect), then shouldn't a .284 caliber bullet have more energy downrange than a .277?



The .308 has less case capacity than the 30-06. Water capacity for the .308 is 56 grains as opposed to the 30-06's 69 grains.

The 30-06 has a greater velocity potential than the 308 in all bullet weights.

Downrange energy is affected by weight and ballistic coefficient. Bullets of identical weight and BC sent at identical velocities will have identical energies.

The .270 140 AB has a BC of .496 versus the 7mm 140 AB's .485. The weight is the same, so if they both start at the same velocity, the 270 will retain more velocity and carry more energy, due to the higher BC.


14 thousanths of an inch in BC can't equal much of a difference in downrange energy and velocity.  still seems to me the biggest questions remaining are length of action, bullet selection and whether or not you reload.

unless you're a fan of preparing for the zombie apocolypse in which case you should be looking at a 30.06 or .308, purely for the available ammo laying around.

my personal opinion is... i have a .270win ... i don't have a 7mm-08.  i would like to have a 7mm-08, but if i had it to do over again, i'd still buy a .270 first because even in a roadside store in the middle of BFE, where there were only 6 boxes of rifle ammunition on the shelf (all remmy core lokt btw), there was .308, 30.06, 300WM and .270win.   it's hard to go wrong with one of the most popular hunting cartridges ever.
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cpwomack View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cpwomack Quote  Post ReplyReply Direct Link To This Post Posted: April/13/2012 at 10:42
I have both, first deer rifle I ever bought was a Savage 110 in 270 and have killed many a deer with it.  My father-in-law gave me a 7mm-08 and I have taken a few deer with it.  Although 270 ammo is usually much more common, I went into a Walmart in El Dorado Arkansas to buy my hunting license and they had no 270 and 10 boxes of Remington 7mm-08 ammo, the 270 had sold out fast.
 
I prefer my 7mm-08 because it is a shorter and easier to handle in the climbing stands and box stands that I hunt out of and my shots are normally less than 200 yards, but like Dyelynn stated, if I did it all over again I would still go with the 270 first.
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300S&W View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 300S&W Quote  Post ReplyReply Direct Link To This Post Posted: April/13/2012 at 10:55
 
  For me when it comes down to these two cartridges it more the rifle than the chambering.  I've got a M70 Classic Fwt w/a factory McMillan stock in .270 Win that handles great.   If it happened to be a 7mm-08 it wouldn't hurt my feelings at all.
"I ain't got time to bleed!"
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DCAMM94 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DCAMM94 Quote  Post ReplyReply Direct Link To This Post Posted: July/14/2012 at 11:16
I have the Model 70 featherweight in 7mm-08 and I love it. For me, a 120gr TTSX for whitetail is the gold standard for whitetail out to 300yds. I also like my A-bolt .270, but I also like the short action, especially in the model 70, in 7mm-08. Hands down my favorite texas cartridge. I do handload, and I can get 3000fps with the ttsx out of the 22" barrel over varget. I also find that the barnes bullets like to be pushed to max recommended loads or a little over. My opinion, obviously. Worth what you paid for it.
Although personally I am quite content with existing explosives, I feel we must not stand in the path of improvement. -Winston Churchill
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Peddler View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peddler Quote  Post ReplyReply Direct Link To This Post Posted: July/14/2012 at 20:29
Just got my wife the new Savage Lady Hunter in 6.5 Creedmoor and after it was broke in it's a real
 shooter for a lightweight platform. We put a Nikon Monarch 2.5 - 10 X 40 BDC on it  and she'll kill as many deer with it as I will with my .257 Roberts or my .270.

Peddler Big Smile
When you are dead, you don't know you are dead.It is difficult only for others.

It is the same when you are stupid.
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Stevey Ducks View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Stevey Ducks Quote  Post ReplyReply Direct Link To This Post Posted: July/20/2012 at 14:25
As everbody knows the .270 is one of the great classic hunting rounds.
 
The 7mm-08 is a highly worthy caliber also.
 
My observations, some of which may be controversial are that:
 
Bullet diameter .284 vs .277 - .007 inch diff.
Availabiltiy of match bullets 7mm-08 many, .270 very few
Powder capacity .7mm-08 kind of limited, best velocities with 140's appear to be with ball H414 or like just under 3000, .270 takes almost a full case of H4831 (classic load) to give about 3100 or so with 130's.
7mm-08 fits in a short action rifle, .270 needs a long action.
 
I know of 3 very sucessful hunters who have killed game from Alaska to Africa using the .270 with 130 gr bullets including big bears and plains game. Bullets used are the olde 130 gr Nosler solid base (pre ballistic tip, life time supply acquired) world wide, the 130 gr Swift Schirroco (sp?) North America and factory 130 gr loads, Africa - professional hunter using excess ammo left by clients.
 
Before I went to 6.5's that like H4350 better, I shot a 7mm-08 using 140 gr Nosler BT's & W760 and I thought the practical difference for hunting between the 7mm-08 & .270 at my self imposed 400 yd limit was nil but I liked my short action rifle. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 300S&W Quote  Post ReplyReply Direct Link To This Post Posted: July/20/2012 at 14:51
 
   +1  on those "olde" Nosler Solid Base bullets.  I HOPEFULLY have a life time supply of the .308 150's for my .300.  Been using them since I developed the load in the 80's.
"I ain't got time to bleed!"
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