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7mm Magnum's picture
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Location: Custer, Michigan
Joined: 03/16/2008
Posts: 89
7 mm ultra mag

Gary,... its a proven fact that the 7mm caliber is at it's best when shooting a 160 grain weight class projectile. The ballistic coeificient is perfectly suited to the twist rate of the barrel. ( 9.25 - 1)

I personally like to load up the 162 grain Hornady BTSP projectiles. Thumbs up

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Location: Midwest
Joined: 12/17/2007
Posts: 64
7 mm ultra mag

What do you think of the 160 gr. Barnes X bullets? I bought two boxes and was thinking of taking them on my next elk hunt - w/ my 7mm

7mm Magnum's picture
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Location: Custer, Michigan
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7 mm ultra mag
ginkgo72 wrote:
What do you think of the 160 gr. Barnes X bullets? I bought two boxes and was thinking of taking them on my next elk hunt - w/ my 7mm

Barnes makes an excellent bullet,.. I've been working with them for the last 4-5 months with both my 7mm and my .300 SAUM

I prefer the TSX over the X due to the boatail design and the ballistics of them,... but both styles will do the job. The only thing that you need to do is achieve the correct seating point off the lands for your particular rifle.

Due to the characteristics of a solid copper bullet,.. they need to make them longer in length to get to the proper grain weight that they are specified. In so doing, they take up more space within the brass case so the powder charge volume is decreased. That volume needs to be made-up by altering the "speed" of the powder.

The link I've posted below is the BARNES website for your 7mm Ultra Mag
you can use it to view their recomendations and go from there to anywhere else on their webpages to do some research.

http://www.barnesbullets.com/images/7mmRemingtonUltraMagWeb.pdf

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Location: Midwest
Joined: 12/17/2007
Posts: 64
7 mm ultra mag

7mm Caliber

Diameter Weight Description S.D. B.C. CAT#
.284" 120 gr TSX BT .213 .349 28442
.284" 140 gr TSX BT .248 .394 28444
.284" 150 gr TSX BT .266 .408 28447
.284" 160 gr TSX FB .283 .392 28446
.284" 175 gr TSX FB .310 .417 28448*

Thanks! I looked and I did get the TSX....any ideas if the 175gr TSX is around to purchase? The biggest factory load I can find is 160gr.

160gr or 175gr for elk?

7mm Magnum's picture
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Location: Custer, Michigan
Joined: 03/16/2008
Posts: 89
7 mm ultra mag

Are you handloading,... or looking for factory loaded 175 Grain TSX's ??

I'm not aware of anyone currently loading 175 grain TSX projectiles in the 7mm UltraMag caliber. I know Federal Ammunition uses Barnes products in some of their offerings along with Swift A-Frame projectiles.

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Location: Minnesota/South Dakota
Joined: 09/06/2006
Posts: 87
7 mm ultra mag

I shoot the 7mm STW for elk and use 140 gr. Swift A-frame bullets.. Very accurate, great penetration and unbelieveable bullet composition. Any of the premium bullets would serve you well. Your RUM should be great Elk medicine at most any range that you can accurately shoot. Hard to find ammo for my STW also and am thinking about the reloading benefits also.

7mm Magnum's picture
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Location: Custer, Michigan
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7 mm ultra mag
HuntnFish wrote:
I shoot the 7mm STW for elk and use 140 gr. Swift A-frame bullets.. Very accurate, great penetration and unbelieveable bullet composition. Any of the premium bullets would serve you well. Your RUM should be great Elk medicine at most any range that you can accurately shoot. Hard to find ammo for my STW also and am thinking about the reloading benefits also.

You'll notice that a majority of the calibers that didn't make a resounding sales increase for any length of time for the manufactures will have factory built ammo at a VERY limited selection.

When the .300 WSM and the .300 SAUM were both competing on the market,... the WSM beat out the SAUM in popularity and sales. In doing so, the marketing for the SAUM dropped and so did the lineup of manufactures making ammo for it. Remington is the only one out there who is making factory ammo for it,... of course it's their baby so they kinda' have to but the selection of grain weights and make projectiles are limited to just 2.
The 165 grain is a Remington Corelock and the 180 grain is a Nosler Partition.

I like to be able to have MORE choices of everything so I DO reload,.. for all my calibers and even some I don't personally own... but friends do. Think

buffybr's picture
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Location: Montana, USA
Joined: 11/15/2007
Posts: 329
7 mm ultra mag

Although I used 140 gr Ballistic Tips in a 7mm Rem mag for Plains Game on my first hunt in South Africa, making one shot kills on Kudu, Gemsbok, and Blue Wildebeest, I prefer, and now use 160 gr bullets. My favorite 7mm Rem mag load now uses the 160 gr Accubond bullet. It is accurate and makes a large, deep wound channel.

Location: Richfield, Utah
Joined: 11/26/2008
Posts: 64
7 mm ultra mag

The 7mm Nosler 160 grain accubond has a ballistic coefficient of .531 which means a lot of retained downrange enery. I would choose the Nosler over the barnes if for no other reason than this number. It is huge!!

The ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the deceleration —a high number indicates a low deceleration. BC is a function of mass, diameter, and drag coefficient. It is given by the mass of the object divided by the diameter squared that it presents to the airflow divided by a dimensionless constant i that relates to the aerodynamics of its shape.

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