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7mm Rem. Mag vs. .308 Winchester

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Unread 01-14-2004, 11:51 PM
Junior Member
Join Date: Jan 2004
Location: Boise, ID
Posts: 9
7mm Rem. Mag vs. .308 Winchester

I'm new to this forum but prowl many others. I am about to purchase a new rifle. I was leaning toward the Weatherby Mark V in 7mm Rem. Mag. but I was not real happy about the weight,8-3/4 pounds w/out scope & mounts - 26" barrel. I can get the same rifle in .308 Win. weighing in @ 7-1/4 pounds - 24" barrel. I like the idea of a lighter rifle.

I'm concerned about the ballistics if I go with the lighter gun. Both rounds are good but...

I will use the rifle for Deer & Elk. Hunting is done in Idaho & Wyoming. Any suggestions/recommendations would be helpful.
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Unread 01-15-2004, 03:36 AM
Junior Member
Join Date: Jan 2004
Location: Pilbara, North West- Australia.
Posts: 3
Re: 7mm Rem. Mag vs. .308 Winchester

Hi, T. Ray, buy a 30 cal, a 300 WSM or like.
Just a suggestion.
There's a lot of blokes on this site who shoot some serious horsepowwer and distances, me I love my Brno zkk 602, in .375 H&H. As I shoot a lot of Camels and Donkeys for pet meat in the north-west of West Australia, and a fair few pigs and goats.
Have a read of www.african-hunter.com/lessons_learned. Rifle lessons learned from professional hunters, interesting reading about different rifle makes, and what happens when you push them.
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Unread 01-15-2004, 04:34 AM
Posts: n/a
Re: 7mm Rem. Mag vs. .308 Winchester

May seem a bit strange for a couple of Aussies to offering advice on Elk cartridges, however I have hunted them in Nz and know they are a serious size.
The cartridges you have mentioned will kill them but as with any calibre you will have to place the shot carefully, use a suitable projectile and limit your range.
I would have to agree that if you are considering longer ranges on Elk then you should up the ante calibre wise.
I tend to come from the old Elmer Keith school - use the heaviest rifle you can reliably handle i.e. hit with. Velocity hepls with hold over on long shots as does bullet weight = high bc etc.
The final equation I believe is bullet weight - the heavier the pill the easier the kill. My .02
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Unread 01-15-2004, 04:56 AM
Bronze Member
Join Date: Feb 2003
Location: New York
Posts: 90
Re: 7mm Rem. Mag vs. .308 Winchester

I agree with Aussie. My buddie hunts with a 30-378 Wthy Mag. Its alot of gun, but with a muzzle break its not that bad to shoot. No matter what the game, shot placement is the key. Between the 7mm mag and 308, I would think the 7mm has a slight edge over the 308. Good luck with your choice. Your really can't wrong with either.
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Unread 01-15-2004, 06:39 AM
Posts: n/a
Re: 7mm Rem. Mag vs. .308 Winchester

Thanks DG
I would personally limit my shots on Elk with a .308 to around 200 yds max and maybe add another 50 yds max 100 with 7mm.
Even then I would not try and bust shoulders but aim for heart / lung type shots with this calibre.
I have owned both calibres myself and have shot the most centre fire rounds on game in the.308W - actually around 10,000 on game , mostly feral pigs. I have also used the .308W in Africa where the game is very tenacious to life.
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Unread 01-15-2004, 06:56 PM
Platinum Member
Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,830
Re: 7mm Rem. Mag vs. .308 Winchester

7mm mags are great in theroy.

The reality is they burn barrels quick, their hard to get accurate, the kick like a mule, has less bullet selection... The list goes on.

Take for instance the 308 vs the 7mm rem mag. You can drive a 168 SMK from a 7mm rem at 3000 FPS with a BC of .488

The 308 win can drive a 155 grain SMK at the same speed with the right barrel. Most agree that the 155 SMK has a BC of .450 (close the the 7mm 168) In the 30 cal selection of bullets we have 155's with BC's of .460, .475, .508 Now we are getting less wind drift, flatter trajectory and higher velocity at any range.

Comparing the 2 we end up with 1 rig (7mm) that is delivering -264" at 1k with 723 FPE left and 87" of drift for 10 MPH (168 SMK)

The other rig (308 win) we end up with -255" at 1k with 711 FPE and 82" of drift. 155 Lapua Scenar)

I am not saying that the 308 can kick the 7mm's ***** any day in trajectory or energy. There are rifle/load combos in 7mm that will kick the crap out of it. But... They still arent inherently accurate and the burn barrels and kick hard. So if you want to limit your range, pay for extra barrels, are impervious to recoil, and only need a few bullets to choose from then the 7mm is the gun for you.

A second choice to the 308 if its not potent enough is the 300 WSM.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
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Unread 01-15-2004, 08:52 PM
Platinum Member
Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,517
Re: 7mm Rem. Mag vs. .308 Winchester

Sounds like a little cartridge bias here. [img]images/icons/tongue.gif[/img]
Lets not compare apples to automobiles, or, fast 308's to slow 7mm mag's. On any given day the 7mag will outperform the 308. More retained energy and less wind drift in a fair comparison.
The 7mag does not kick bad unless you're recoil sensitive, it's rather easy to load accurate ammo for, even though the 308 is less picky and shoots nearly anything, and the barrel should have adequate lifespan for a hunting rifle. Heck, my 7STW has nearly 1,000 round through the tube and still shoots great.
Don't get me wrong, the 308 is a great cartridge but it can't outpower the time honered 7mm Mag.

VH - .284 biased [img]images/icons/grin.gif[/img]
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