Home Forums Reloading Big Game Rifles 7MM Remington mag. and 140 gr. Partitions

Using 140 grain Partitions and Reloder 22 to push them as fast as reason allows what is this combination especially good for?

Just about anything.

I think I would like at least a 160 grain bullet for elk but figure it will work for big feral hogs down thru Mule deer, Whitetails and Antelope in a fine fashion.

I use 75gr of Retumbo behind 140gr accubonds for 3330fps. and great accuracy, and 71.5gr behind a 160gr accubond also with great accuracy.

The 7mm Rem Mag and 140 partition is fine for a host of critters as long as you only shoot dinks...

It seems pointless to shoot a 140 in a 7 Mag. when you can get around 3,000 fps with a 160.

Smitty of the North

3000 fps is a useful velocity for sure but around 3200fps is too. Having shot a lot of game with Speer 160 grain Hotcors I figure a 140 grain partition would do just as well and could be pushed a bit faster to boot. My intended use is as a trophy Whitetail rifle in north Texas.

rickt300:
You're probably right, with whitetails, anyway.

The BC is better with the 160, so there wouldn�t be much difference in trajectory with the lighter bullet at long range.

The 160 should give you more reliable terminal performance, especially at short ranges, and they make 160 grain Nosler Partitions too.

That's why I think it's pointless to use a light bullet in a high velocity Magnum, where the heavy bullets go fast too.

Smitty of the North

Rick-the 140 Noz bullet will do you just fine and has done well for me over the years in various 7 RM's and my Mashburn Supers.

The bullet will easily handle all game up to and including elk to long range.

I certainly don't agree with Smitty's sentiments but I can only go off what I've learned from using the big 7's and various bullets weights for 2.5 decades.

The bullet will be just as effective as a 160 at the closer ranges and at ranges on the farther edge.

It will take quite a long ways for the 160 to begin to surpass the 140's.

And, I could easily say that as effective as the 140 has proven to me over the years that I see no good reason to run a 160 @ 200 fps slower.

My take is you've a darn fine choice.

If you're wanting to consider any others take a close look at running R22 with a 120 TSX. It'll shoot lights out and it will be a darn laser for a long butt way!

Just a thunk

Good luck to ya

Dober

Mark,

We all know the 120grBT is thee bullet for all 7mms!

MtnHtr

I have 300 of the 140 grain Partitions, 200 150 grain Ballistic Tps and 100 150 grain Sierra Gamekings. In all liklyhood at the age of 51 I won't shoot all these bullets up in ten years. Too many rifles.

No doubt you've plenty of bullets unless you decide to kick azz on a small 3rd world country....grins

A quick note from the throne, looking at the Nozler manual and comparing the 140 @ 300 to the 160 @ 3100 (both top end speeds for the most part).

The 140 NPT has a .434 BC and the mighty 160 has a BC of .475.

I zeroed em both right dead nuts on @ 100, as that is IMO the only fair way to really see how they stack up in terms of drop. Heres what the good book says about it.

140 @ 400= -20.2"
@ 500= -37.6"
@ 600= -62"

And now it is about to soundly get its clock cleaned or should I say "trumped" by the mighty 160 and its huge BC.

Ready.....

160 @ 400= -23"
@ 500= -42.5"
@ 600= -69.4"


Oucha, I sure do hope that bullet can picks its butt up off the floor some time soon after that sound butt kicking, I guess I should say the bullet being the 160!

Seriously either will work just fine, pick one and go forth and fill up an ark.

Dober

I am telling you Stacy if you gode that L24 guy into this I will fly to Cali-shoot one of your big bruins and then make you buy my dinner...grins

Dober

It will be fun backing up you since you will be bringing along one of your 22 centerfires. Just be sure to pack some extra skivvies, you will need them!

MtnHtr

Good to hear you like spectator sports as that will be the extent of your backing me up.

Now packing game for me is a whole nuther thing...grins

Make it a good day!

Dober

Mark,
I fully agree. I'm 24 years and over 40 species of game into my love affair with the 7 Rem mag. Without over-"gacking", and specific only to the 140 vs 160 partition I'd offer:

Objectively - As far as what I call "ballistic alphabet soup" the bc's of the 2 bullets are too close for the 160 to overcome the 140's speed advantage at any practical distance, and the sd's are so close as to not be a factor for those that think energy kills. My home range is 660 yards, and at that distance in my favorite rifle the 140 at 3230ish flies just at 1 moa flatter than the 160 at 3020ish. Wind correction is identical.

Subjectively - what I call the "killability factor", the 140 just seems to kill the crap out of stuff. "Bullet integrity" has never been a problem on game from 30 pound roe deer to 2000 pound eland from 20 yards to farther than I'll admit to. As always, one's mileage may vary, but mine sure hasn't...

Rick - let my 14 year old son at that stash and you'll be re-upping in just a few days!

rick,

For years, I handloaded 160 gr. bullets, mostly Sierra Gamekings and NP's, for 7mm Rem. Mag. Velocities were modest- around 2950 fps- but this combo, with either bullet, was and is a great killer of game. I used it on the range of pronghorn to big mule deer, elk, and moose, with great results.

More recently, I have worked up loads for my .280 Imp., using the Nosler Partition, Barnes TSX, and Accubond bullets. I can safely push them to around 3175-3200 fps, from my 24" barreled Ruger #1. I have used this combo, with the NP's, on elk, with great results. The difference between the velocities I get with the .280 Imp., vs. what you might achieve with the 7 Mag, is negligible.

Main difference, in my opinion, between well-constructed 7mm 140 gr. and 160 gr. bullets, is the reduced recoil with the lighter bullets. To me, at least, the difference is noticeable enough to want to continue with the 140 grainers.

Bighorn-I am a bit confused where on earth did Rick ask about how the 280 AI compare to the big 7?

Thx

Dober

"DWS" (darn well said) there Journeyman!

Dober