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 7mm Ultra Mag vs. 7mm WBY MAG
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Dave W.
Advanced Member

USA
11301 Posts

Posted - 05/05/2004 :  4:32:22 PM  Show Profile
Can anyone give me the run down on which one has the edge over the other, my most recent ballistics book doesn't list the 7mm Ultra Mag. Thanks in advance.

R/

Dave

How different the world would be if we could consult the veteran instead of the politician. - Henry Miller

Colt Super
Advanced Member

USA
28650 Posts

Posted - 05/05/2004 :  8:16:25 PM  Show Profile
The Weatherby outperforms the Ultra by AT LEAST 7,000 percent. Since I'm the only "expert" responding, I guess nobody has any numbers - muzzle velocity and energy, 500 yard velocity and energy - to prove me wrong!!

But then, I'm no expert.

God Bless America and...
NEVER Forget WACO
NEVER Forget RUBY RIDGE
NEVER, EVER Forget 911
Lock and load
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JustC
Moderator

15008 Posts

Posted - 05/05/2004 :  8:42:41 PM  Show Profile
I would say that "real world velocity" figures would give the RUM a 200-300fps advantage.

why chase the game when the bullet can get em from here?....
Got Balistics?
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Colt Super
Advanced Member

USA
28650 Posts

Posted - 05/05/2004 :  8:48:30 PM  Show Profile
As a dedicated Weatherby fan, can you tell me where your numbers came from?

I'd like to look up some other stuff there.

Thanks from... Doug, the unconvinced.

God Bless America and...
NEVER Forget WACO
NEVER Forget RUBY RIDGE
NEVER, EVER Forget 911
Lock and load
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BigGameHunter42
Junior Member

USA
221 Posts

Posted - 05/05/2004 :  9:12:23 PM  Show Profile
7mm ultra mag : 140 gr corelokt : muzzle : 3425fps .100 yds : 3158 fps. 200 yds 2907 fps energy : muzzle 3646 ft-lbs . 100 yds 3099 ft-lbs . 200 yds : 2626 ft-lbs ... this is from the remington 2004 catalog . 24 inch barrel


7mm wby mag : 140 gr partiton : muzzle velocity: 3303 fps . 100 yds : 3069 fps . 200 yds : 2834 fps . energy : muzzle 3391 ft-lbs . 100 yds 2927 ft-lbs . 200 yds :2519 ft-lbs . weatherby 2004 catalog ... 26 inch barrel .


they are both GREAT cartridges but the ultra mag kicks a$$

if i had more tiome i would show you all more but i dont have time so ... the winner for NOW is the ultra mag ... that could change tomorrow though


as far as bullet drop .. i am not sure but i will post it tomorrow if that is what you would like .

hope this helped


keep in mind 26inch versus the 24 inch ... o yea the sight in marks are different in the catalogs the remington is at 100 yds and the wby in at 300 ... so it will be close tommorow
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nononsense
Moderator

8983 Posts

Posted - 05/05/2004 :  9:18:50 PM  Show Profile
Rifle DATA
From Hodgdon - NEVER Exceed the Loads Listed Here!http://www.hodgdon.com/data/retumbo/7mmremultramag_r.php

7MM REMINGTON ULTRA MAGNUM
CASE: REMINGTON


BBL: 24"
PR: REMINGTON 9 1/2M

TWIST: 1:9.5" TRIM: 2.840"



115 GR. SPR HP (Starting Loads)
DIA. .284"
COL: 3.450"

RETUMBO 98.0 3398 54,100 PSI

115 GR. SPR HP (Maximum Loads)
DIA. .284"
COL: 3.450"

RETUMBO 104.0C 3683 64,100 PSI



120 GR. NOS BT (Starting Loads)
DIA. .284"
COL: 3.600"

RETUMBO 96.0 3326 52,100 PSI

120 GR. NOS BT (Maximum Loads)
DIA. .284"
COL: 3.600"

RETUMBO 102.5C 3601 62,300 PSI



130 GR. BAR XBT (Starting Loads)
DIA. .284"
COL: 3.560"

RETUMBO 93.0 3223 52,400 PSI

130 GR. BAR XBT (Maximum Loads)
DIA. .284"
COL: 3.560"

RETUMBO 99.5C 3514 63,600 PSI



140 GR. BAR XBT (Starting Loads)
DIA. .284"
COL: 3.560"

RETUMBO 90.0 3142 55,200 PSI

140 GR. BAR XBT (Maximum Loads)
DIA. .284"
COL: 3.560"

RETUMBO 96.5C 3353 62,900 PSI



145 GR. SPR GSSP (Starting Loads)
DIA. .284"
COL: 3.580"

RETUMBO 93.0 3159 52,800 PSI

145 GR. SPR GSSP (Maximum Loads)
DIA. .284"
COL: 3.580"

RETUMBO 99.0 3388 63,400 PSI



150 GR. SFT SCIF (Starting Loads)
DIA. .284"
COL: 3.600"

RETUMBO 89.0 3054 53,000 PSI

150 GR. SFT SCIF (Maximum Loads)
DIA. .284"
COL: 3.600"

RETUMBO 95.0C 3299 63,600 PSI



154 GR. HDY SP (Starting Loads)
DIA. .284"
COL: 3.630"

RETUMBO 90.0 3055 53,400 PSI

154 GR. HDY SP (Maximum Loads)
DIA. .284"
COL: 3.630"

RETUMBO 96.2 3289 63,900 PSI



160 GR. NOS PART (Starting Loads)
DIA. .284"
COL: 3.600"

RETUMBO 88.0 3003 53,700 PSI

160 GR. NOS PART (Maximum Loads)
DIA. .284"
COL: 3.600"

RETUMBO 94.0 3212 62,800 PSI



162 GR. HDY SPBT (Starting Loads)
DIA. .284"
COL: 3.650"

RETUMBO 89.0 3009 53,100 PSI

162 GR. HDY SPBT (Maximum Loads)
DIA. .284"
COL: 3.650"

RETUMBO 95.0 3223 62,700 PSI



168 GR. SIE HPBT (Starting Loads)
DIA. .284"
COL: 3.650"

RETUMBO 89.0 2986 54,400 PSI

168 GR. SIE HPBT (Maximum Loads)
DIA. .284"
COL: 3.650"

RETUMBO 94.0 3171 63,300 PSI



175 GR. SFT SP (Starting Loads)
DIA. .284"
COL: 3.600"

RETUMBO 86.0 2919 57,300 PSI

175 GR. SFT SP (Maximum Loads)
DIA. .284"
COL: 3.600"

RETUMBO 91.5 3069 63,400 PSI
______________________________________________________________________

From Hodgdon - RIFLE DATA
NEVER Exceed the Loads Listed Here
7MM WEATHERBY MAGNUM
CASE: REMINGTON

BBL: 24"
PR: FEDERAL 215 M



140 GR. SFT SP
COL: 3.250"

H1000 79.0 C 3273 49,900 CUP
H4831 74.0 3258 54,000 CUP
H4350 68.5 3248 54,000 CUP


160 GR. BAR XFB
COL: 3.250"

H1000 75.0 C 2994 50,800 CUP
H4831 70.0 2971 53,900 CUP
H4350 65.0 2950 53,900 CUP


175 GR. HDY SP
COL: 3.350"

H870 80.0 2843 44,300 CUP
H1000 74.7 C 3022 54,000 CUP
H4831 67.5 2895 53,400 CUP
H4350 63.7 2899 53,600 CUP
______________________________________________________________________

Obviously, I selected the wrong data the first time and completely missed it when I proofed what I wrote. Sorry about that! Here is the correct data.






Edited by - nononsense on 05/05/2004 10:19:38 PM
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Guns & Glass
Senior Member

1035 Posts

Posted - 05/05/2004 :  9:36:54 PM  Show Profile
Strongly suggest you double check, then triple check the Remington catalog.
No make that catalogs.
Then check ballistics tables.
Then check barrel lengths.
Then check the type of barrels used.
Then compare their down spec'd loads to other manufactures.

In their sales literature they WRONGLY compared cartridges of the 300 Rummy, and the 7mm "Rummy". My name for the Rem Ultras.

Strongly suffers from Pinnochiotis. Just remember why his nose grew.





Happy Bullet Holes!
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Colt Super
Advanced Member

USA
28650 Posts

Posted - 05/06/2004 :  01:17:38 AM  Show Profile
"whiskey for my men and beer for their horses!"

Thank you.

For Sale: Weatherby Mark V Deluxe in 7MM Weatherby Magnum - now only useful as a bat.

God Bless America and...
NEVER Forget WACO
NEVER Forget RUBY RIDGE
NEVER, EVER Forget 911
Lock and load
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375H&H
Senior Member

1132 Posts

Posted - 05/06/2004 :  01:43:30 AM  Show Profile
I would sure like to have that " BAT "

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nononsense
Moderator

8983 Posts

Posted - 05/06/2004 :  09:43:57 AM  Show Profile
Dave W.,

Here is some real world information from real world shooters. No innuendo here, just fact:

Or...use Lost River Ballistic's more solidly constructed 160 grain bullet with its .715 BC.
As of 2 days ago I finally have a properly twisted and chambered barrel that shoots them into 1/2 moa vertical group size at 500 and 700 yards. Won't be able to try them at 900 yards until after my deer season which starts tomorrow.

Anyway, 7mm Ultra at 3,450 fps from a 30 inch Hart stainless, 7 twist barrel. At an elevation of 8,000 feet and a range of 1,000 yards energy is still 2,140 ft/lbs. That's about the same as a 30/06 at 2 or 3 hundred yards. I think that will work quite well. The reduced drift from wind should be awesome. Computes to only 29 inches for 10 mph sidewind at 1,000 yards. My very small amount of experience tells me wind drift is the limiting factor for long range first-shot kills.
http://www.longrangehunting.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=000118
_________________________

Does anyone have any load suggestions for the 7mm RUM with the Scirocco 150gr. bullet in a 28" barrel? Is there any experience with Vihtavouri high energy powders (eg N560) for this load? Are there any better suggestions for deer hunting loads for the 7mm RUM? Thanks,

I just ran some 140 X's over the Oehler for a guy at the range, they were 3750-3800fps, can't remember the load though. His was a Rem700 26".

My best shooting load is 95 gr RL 25 with a 140gr Nosler Ballistic Tip for 3460fps and shoots in the .3 at 100yds. But I think this bullet is not constructed strong enough for the velocity. Shot an Antelope at 250 and it made a 6" entry wound and didn't exit. Hit a Mule Der at 300 and it made about a 5" entry wound and about a 1" exit wound. Both died instantly but I thing the bullet is breaking up. I wouldn't use on anything bigger. Going to try partician 140's.
http://www.longrangehunting.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=000249
__________________________

Here's another good but long discussion:
http://www.longrangehunting.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=000771
__________________________

I would take a run over to this site and do a search on [ 7mm RUM ] which is all that I did. There is a lot more.

Best.



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Dave W.
Advanced Member

USA
11301 Posts

Posted - 05/06/2004 :  10:54:20 AM  Show Profile
Thank you all for the info. Dad I would consider a trade for a certain 30-06 that I have for that "old bat" of yours even.

R/

Dave

How different the world would be if we could consult the veteran instead of the politician. - Henry Miller
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JustC
Moderator

15008 Posts

Posted - 05/06/2004 :  11:06:53 AM  Show Profile
also consider this when using corporately provided balistics data,..

weatherby freebore allows for increased muzzel velocity as the bullet has a running start at the bore. Secondly,..weatherby factory ammunition is a MAX load of imr7828. The lack of bullet/land contact allows the use of the max load while showing no signs of pressure. remington factory ammo is usually considerably downloaded, not to mention they use 24" barrels to test loads where as weatherby uses a 26" barrel. Once the freebore is removed in a custom weatherby chambering, and the loads are kept at acceptable pressures, the factory data soon becomes "over rated". Over a chronograph,..the RUM out of a 26" barrel will show it's true colors as the top dog in big magnums. I have worked with the 7mmRUM, 300RUM, and 338RUM and can say they are all VERY impressive in terms of power and velocity.

why chase the game when the bullet can get em from here?....
Got Balistics?
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