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Old 07-06-2009, 11:50 AM   #1
SPUD
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Default 7mm Rem Mag vs 7mm STW -- What's the difference??

We were talking guns this morning at work and got a guy thinking of buying a new 7 mag. We found some ballistics and the STW outperforms on paper.


But does anyone have a picture of the two cartridges side-by-side???



Blake, Smart, Chew????
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Old 07-06-2009, 11:55 AM   #2
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Not alot in factory loadings. Quite a big difference in Custom Ammo...
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Old 07-06-2009, 12:02 PM   #3
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http://www.rifleshootermag.com/ammun...207/index.html

Here is a pic of the bullets next to each other.
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Old 07-06-2009, 12:04 PM   #4
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Quote:
Originally Posted by Hawkins View Post
http://www.rifleshootermag.com/ammun...207/index.html

Here is a pic of the bullets next to each other.
Exactly what I was looking for. Now why couldn't I find that!! Not to mention the guy that started it all. Layne Simpson.



thanks
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Old 07-06-2009, 12:04 PM   #5
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ditto on what ragin said...

I had a buddy that handloads for the STW, and the difference is substantial.

I'm not sure of the exact load, with with a barnes triple shock 160 grain bullet, he is getting almost 3400 FPS, vs the factory 7mm rem mag load of just under 3000 FPS.

400 FPS extra with a 160 grain bullet translates to quite a bit of energy, as well as shooting a few inches flatter at 400 yards.


if you don't plan on reloading, just get the 7mm rem mag, or even the 7mm short mag

the main difference is the the STW is made from the old 8mm rem mag casing, and then necked down.
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Old 07-06-2009, 12:06 PM   #6
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Quote:
Originally Posted by kyle1974 View Post
ditto on what ragin said...

I had a buddy that handloads for the STW, and the difference is substantial.

I'm not sure of the exact load, with with a barnes triple shock 160 grain bullet, he is getting almost 3400 FPS, vs the factory 7mm rem mag load of just under 3000 FPS.

400 FPS extra with a 160 grain bullet translates to quite a bit of energy, as well as shooting a few inches flatter at 400 yards.


if you don't plan on reloading, just get the 7mm rem mag, or even the 7mm short mag
X2... The 7mm Remington Mag is hard to beat as far as factory loadings... And with all these new ballistic compensating scopes the couple extra inches flatter is nill...


But I like that 6.5 STW !!!!!!!!!!!!!!!

Last edited by Ragin'; 07-06-2009 at 12:11 PM..
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Old 07-06-2009, 12:11 PM   #7
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Quote:
Originally Posted by kyle1974 View Post
if you don't plan on reloading, just get the 7mm rem mag, or even the 7mm short mag

the main difference is the the STW is made from the old 8mm rem mag casing, and then necked down.
these would be handloads.


Quote:
Originally Posted by Ragin' View Post
X2... The 7mm Remington Mag is hard to beat as far factory loadings...
I heard that.



But we have found from several ammunition sites that the speed is about 400 fps faster. But what jumped out was the down range energy. It was 200+ on several charts. Getting factory loads to do that is a different ball game.


Thanks for the info guys
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Old 07-06-2009, 12:14 PM   #8
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John Burns of Best of the West and owner of Best of the West Gunwerks told me that the 7mm STW was one of the best for long range hunting without going to a wildcat round... He prefered it to the 7mm Rem Mag and the 7mm Weatherby...
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Old 07-06-2009, 01:51 PM   #9
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A buddy of mine reloads the 7 STW I will see what I can drag out of him for performance.
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Old 07-06-2009, 01:52 PM   #10
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Quote:
Originally Posted by Ragin' View Post
John Burns of Best of the West and owner of Best of the West Gunwerks told me that the 7mm STW was one of the best for long range hunting without going to a wildcat round... He prefered it to the 7mm Rem Mag and the 7mm Weatherby...




Thats a good tip there. This guy would be using this as his primary "out west" go to gun. He has been going to Colorado for a few years now and is thinking of upgrading.


Just round table talk as usual this Monday morning.
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Old 07-06-2009, 02:10 PM   #11
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a lot more powder usage.
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Old 07-06-2009, 02:12 PM   #12
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How does it compare to the 7mm Ultra mag? does anyone have pictures comparing these two casings?
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Old 07-06-2009, 02:35 PM   #13
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There is also THE 7.21 Firebird / Lazzeroni....99gr of powder behind a nickle coated 120gr triple shok coming out close to 3900fps on the Oehler. Barrel life is only going to be around 900 rounds before accuracy starts to fade. Mine is built on the same Sako action as their TRG Lapua sniper rigs & a 30" Hart bbl. It's a heavy beast.....we kill 3 or 4 deer with it every year.

.220 Swift
.257 Wby
.280 AI (30-06 case)
7.21

I like the stw but this lazz. is just a crazy flat whitetail round.
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Old 07-06-2009, 02:41 PM   #14
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What casing is the Lazz built on? I notice it is not belted.
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Old 07-06-2009, 02:50 PM   #15
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spud , FYI ..........

depending on the bullet weight used and powder selection, you can load various powder charges weighing from :

cartridge ...................powder charge.........approx. velocity 150 gr bullet ...

7 mm Mag............................ 65 to 70 grs ... roughly 3100 fps

7 STW................................. 80 to 90 grs .... roughly 3350 fps

Rem 7mm Ultra mag................. 85 to 100 grs ... roughly 3250 fps

280 Ack Imp (my favorite )..... 57 to 62 grs .... roughly 3000 fps

7 mm Win Short Mag ............... 55 to 70 grs .....roughly 3000 fps

Last edited by Cajun Blake; 07-06-2009 at 02:53 PM..
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Old 07-06-2009, 02:54 PM   #16
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I shoot the STW and with 168gr. Sierra BTHP and 79gr. of powder I get 3200fps. and 30" drop at 500yds sighted in at 100.
It is WOW on deer and coyotes!!!!!!
It's in my avitar.
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Old 07-06-2009, 02:59 PM   #17
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Quote:
Originally Posted by Fingershooter View Post
What casing is the Lazz built on? I notice it is not belted.
My understanding is It's his own proprietary design....I don't like belts on sharp shouldered rounds. It's just not needed and their original design was to make sure low sloping cases would extract on dangerous game / turn bolts. For the reloader, you have to watch for case stretch around the belt too. They just kinda stuck in the shooting world with the word 'magnum' and even incorporate them on new rounds too??
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Old 07-06-2009, 03:01 PM   #18
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Quote:
Originally Posted by Cajun Blake View Post
280 Ack Imp (my favorite )..... 57 to 62 grs .... roughly 3000 fps

mine too.....my rig loves N165.
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Old 07-06-2009, 03:22 PM   #19
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Quote:
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mine too.....my rig loves N165.

Like preaching to the choir Paul ... Vihtavuori powders are the only way to go

I just bought 16 lbs of N133 and 8 lbs of N130 (24 pounds )

my small caliber wildcats love this stuff

Coyotes HATE it
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Old 07-06-2009, 03:30 PM   #20
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Quote:
Originally Posted by Cajun Blake View Post
Like preaching to the choir Paul ... Vihtavuori powders are the only way to go

I just bought 16 lbs of N133 and 8 lbs of N130 (24 pounds )

my small caliber wildcats love this stuff

Coyotes HATE it
I use them almost exclusively....the paper usually confirms it for me. I have some other reloading buddies who say I'm silly for paying more & think I'm a powder snob.

N135 and the 6BR with 66-68br pills are a match in heaven!! I almost thought my 35p was broken when working up loads the 1st time.
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Old 07-06-2009, 03:42 PM   #21
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If you want to know more about the 7 STW pick Hoytpro2001's brain. He has it down pretty good!
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Old 07-06-2009, 04:24 PM   #22
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The biggest difference?

One you can find ammo for... I'll let you figure out which one.

Todd
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Old 07-06-2009, 04:46 PM   #23
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STW stands for Shooting Times Western if I remember right. It's a hard to find cartridge unless you reload. I'd stick with the 7MM REM MAG.
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Old 07-06-2009, 06:36 PM   #24
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I handload for several people. I've shot a 7mm STW since 1991. I had a Browning A-Bolt in 7mm Rem Mag rechambered to the 7mm STW. It was a wildcat back then. A friend shoots the 7mm RUM. I load 140 Nosler Accubonds for both rifles. With max loads for both rifles, the velocity is dead even. STW-3450fps...RUM 3451fps. However, the STW has a 24 inch tube, whereas the RUM sports a 26 inch barrel. It also takes about 7 more grains of powder for the RUM to reach the velocity of the STW. The STW is more efficient, but I really like the lack of a belt on the RUM. Feeds a lot smoother. Shoot me a PM if I can help any.
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Old 07-06-2009, 07:46 PM   #25
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The only thing I didnt like about the STW is that it punishes on both ends
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Old 07-06-2009, 08:41 PM   #26
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Quote:
Originally Posted by bowhuntingw View Post
a lot more powder usage.
AND recoil!
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Old 07-06-2009, 10:48 PM   #27
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jeez i thought i was being fancy when i paid $55 buck for a box of Hornady "custom" Rounds.

Yall lost me at the difference between 7 mag and . . . . .
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