Gentlemen,

I have finally got around to updating the 7mm Remington Magnum page on our website. The new journal article compares the various 7mm magnums and uses a completely UNSCIENTIFIC formula to generate a result.

Let me know what you think...

I think your 7mm RM page is great! I have only used the big seven for 3 years but for my hunting it is a real all-rounder. I appreciate the information gathered and presented on you page. Keep it up!

Tron

PS: BTW, nor varmint loads?? Ok, may be at the fringes of the cart. utility, but still... I use 100 gr Sierra HP-V to shoot Beaver here in Norway!

The author may have been drinking too much beer when watching his rugby game. there are apparent mathematical inconsistencies in the math. note WSM does better than SAUM for several loads, such as 140, 150 and 160 grains, then is shown as having a poorer trajectory at 400 yards, unless this is explained by bullet type nad ballistic coefficient, it renders the table somewhat apples and oranges. The author uses the 400 yard bullet drop for his index.

Nonetheless, it shows how hard it is to be a journalist, watching TV and working at home...

Great article.

thanks

Factory Velocity and Energy Table

Cartridge Muzzle Velocity Muzzle Energy
140 gr. 150 gr. 160 gr. 175 gr. 140 gr. 150 gr. 160 gr. 175 gr.
7mm RM 3250 3110 2950 2860 3300 3220 3090 3180
7mm Weath. 3340 3300 3200 3070 3443 3627 3638 3662
7mm STW 3325 3250 3200 - 3436 3520 3640 -
7mm RUM 3425 - 3200 - 3646 - 3637 -
7mm WSM 3225 3200 2990 - 3223 3410 3176 -
7mm SAUM 3175 3110 2960 - 3133 3221 3112 -



Percentage advantage or disadvantage over 7mm Remington Magnum

Cartridge Muzzle Velocity (FPS) Muzzle Energy (Ft.-Lbs.)
140 gr. 150 gr. 160 gr. 175 gr. 140 gr. 150 gr. 160 gr. 175 gr.
7mm RM 0 0 0 0 0 0 0 0
7mm Weath. +2.7% +6.1% +8.5% +7.3% +4.3% +12.6% +17.7% +15.1%
7mm STW +2.3% +4.5% +8.5% - +4.1% +9.3% +17.7% -
7mm RUM +5.4% - +8.5% - +10.5% - +17.7% -
7mm WSM -0.8% +2.9% +1.4% - -2.3% +5.9% +2.8% -
7mm SAUM -2.4% 0 +0.3% - -5% 0 +0.7% -



Trajectory Comparison - Bullet drop at 400 yards. All trajectories are based on a 200 yard Zero.

Cartridge 400yd. Drop (inches) Compared to 7mm RM
140 gr. 150 gr. 160 gr. 175 gr. 140 gr. 150 gr. 160 gr. 175 gr.
7mm RM -16.6 -17.4 -19.4 -21.3 0 0 0 0
7mm Weath. -15.9 -15.1 -16.4 -18.2 +0.7 +2.3 +3.0 +3.1
7mm STW -16.1 -16.7 -15.7 - +0.5 +0.7 +3.7 -
7mm RUM -14.4 - -16.4 - +2.2 - +3.0 -
7mm WSM -16.4 -18.6 -20.8 - +0.2 -1.2 -1.4 -
7mm SAUM -17.7 -19.7 -19.6 - -1.1 -2.3 -0.2 -

In the comparison table, "+" is used to indicate flatter trajectory, a"-" is used to indicate a more curved trajectory

That is a good read. I have been a fan of the cartridge for 17years now, replacing my 270 as my all around light rifle. I use mine principally for groundhogs now and it is devastating. No going back to .22 caliber varmint loads for me.

JR: If you had no 7mm at all, would you start with a 7mmWSM, STW, SAUM, or Remmag?

thanks

Jameister,

Thanks for the comments. I used data that came straight from the companies. I think the WSM used a fail safe bullet, which had a worse BC than the Nosler Partition in the 7mm SAUM.

It's all kind of confusing, but it was fun to mess around with.

If I was to buy a new one, I'd still probably go with a regular 7mm Rem Mag, but the RUM and STW would be fun to play with as a handloader.