Home Forums Hunting & Shooting Hunting Rifles Practically speaking is there anything a 300 WBY Mag can do that a 7 Rem Mag can't?

EHNM -

I don't know what to say or tell you. I got it in at least 2 diff 24" blls and 'that' friend lives in La. plus Hagel listed it too.

Another friend bought a brand NEW 77 tanger in 7 RM. LONG story/short (I'd be glad to go thru details but not now.) THAT rifle NEVER beat the vel of 270 W.

We swapped powder lots, brass, primers, everything we could think of but nothing helped it. He took it to a gun show, IIRC.

I know that you know:
diff. chambers - bores - powder lots - primers- maybe even bullet lots. I don't know either ? ? ? ?

BTW - the chrono was Oehler 33, 10' space (midway of screens)

Jerry

My T3 7mm Rem Mag gets 2997 with 160 NAB and 72 grains of MagPro.



P

You won't notice the difference between the '06 and 7 Mag in the hunting fields.

I get 3400 fps with 140 gr Nos Bal tip moly and 70 gr H4350 in 7mmRemMag.

I think in the hands of the average hunter, that fires 100 long range practices shots a year, with a 10 pound rifle, this is his best chance of getting enough power into the kill zone at 500 yards.

I think in the hands of a super hunter, that fires 1000 long range practice shots a year, with a 12 pound rifle, a 300WBY mag with heavy boat tail bullet is the best chance of getting enough power into the kill zone at 800 yards.

Forget the energy figures.They are comparable cartridges.

A 160 gr bullet at 3000 fps from a 7 Rem Mag is one of those universal go anywhere-do anything BG loads,just like a 180 gr from a 30/06.You can use either one on anything from antelope to moose and elk. I'd shoot a grizzly with either one.

I think you'd see a bigger difference on animals based on the bullet construction than any real difference between the loads themselves.Personally I'd choose "tough" in bullet construction over "splash" but that's just me.

I have a Ruger tang safety 77 in 7 mag. 3000 with a 160 is easy to get without leaning on it hard.

A B S O L U T E L Y, freaking, TRUE.

That last 100 fps shows little advantage- IF any - anywhere!

Jerry

Correctamundo ! Bob you are right AGAIN. (?) How'd that happen ?







couldn't have been because of, let's say, experience!

Jerry

Jerry,
When I got to 3000 my rifle shot the load sub MOA, I called it good right there.

I decided to work up a lower velocity load with a 150 for the short range deer hunting I do. Nosler's starting load with H4831 gave groups that averaged .8". I need to chronograph it just to see where its at but it will do fine on 50 yard woods shot or 300 yards across the clear cut

Will a Chevy Corvette Z06 do anything my Ford Focus won’t do?

Of course it will. It will put a much bigger dent in my wallet, suck a lot more fuel, take up more space in the garage and cost a lot more to maintain and insure. I commute over an hour one way to work. Would the ‘vette get me there any faster or more surely? Not legally, which is to say “No”, but it might be more fun to drive.

Whether this cartridge or that can do something another cartridge cannot kind of misses the point unless you need to do that specific thing. And then there is generally a price to pay for the enhanced performance, either in a heavier rifle to keep recoil down or in extra recoil. And that extra recoil, like it or not, puts the shooter that much closer to shoulder injury and detached retinas. My .338WM, .300WM, .30-06s and 7mm RM all get the job done reliably but the .30-06s and 7mm RM go hunting more often. This year I plan to use a .280 Rem for my elk hunt and am confident that if I do my part the outcome will be as desired.

Daughter #1 plans to go on her first elk hunt this year. She doesn’t have the shooting skill to take long shots and thus will be limited to about 300 yards. She purchased a .308 Win for the task, in large part because she is recoil sensitive. A .300 WM or WBY would shoot the same bullets faster and flatter and deliver more energy downrange but they would not serve her as well as the .308 Win for the task at hand.

If the hammer you have is big enough, you don’t need a bigger hammer.

Don't worry about it Jwall,it still killed whatever I hit.

B R H - Very Good.

I'd probably do similarly today if I were developing loads for the 7 RM.

OTOH - in the 80s I/we were looking for 'accuracy' with EVERY LAST fps we could get.

That actually was caused by 'magazine articles' & books. Shall we say, "Gunwriters" ? ....

I'm making light BUT it is actually TRUE.
I don't remember a single article that didn't encourage getting the most vel with the best accuracy.

Things have changed some in 30 odd yrs. I still CAN'T bring myself to 'get by' with pedantic velocity (speed). Believe it or not HI VEL does accomplish 3 positive things (at least). Now I have to get off this slick slide.

Jerry

'WHENever you hit?' <G>

Another related TRUE story. Somewhere between 80-90 I bought 2 boxes of NEW Norma 270 Win brass. Yes Norma.

Just for kicks I chronoed the loads, same load I'd been using for yrs.,...OH MY! 200 fps LESS!

Well I ran round & round as in a Silo.... I finally figured out (fact) that brass lost those 200 fps ? ?

2 boxes of NEW brass in the CAN, trash that is!!

Jerry

Biggest bull elk I ever saw was shot by a tiny woman with a 243 at 200 yards. She said 270s kick too hard.

As to the header? More recoil..

I shoot a lot with both my 7mm RM and .300 Win. Mag off the bench and the 7 has a fun factor that is lacking in the .300. BUT for elk, I am going to grab the .300. I think everything I said would be even more true of the .300 Wtby.

I used to do exactly the same thing.....mostly.

Me too..Used to

270 maxed out with 140 NAB's is closer to a 7RM with 160's than one might think. At 500, the 7 RM has 3" less drop, 2" less drift, 100 FPS faster, and an additional 335 FPE, for whatever that's worth. I have a feeling only the chamber really knows the difference.

And of course, the experts.........

No experts here

Ballistic improvements come grudgingly. In a crowded field with bullets separated by a few grains,velocities by 100-300 fps,it's easy to look at tables and say not much difference.

It's often been said that the difference between some standard and magnum cases in a given caliber is 50, maybe 100 yards.

More importantly maybe,if we figure bullet expansion requires,say, 1900 fps,we see the 7 Rem Mag with a 160 AB will stay above that threshold to 700 yards,while the 270-140 AB example is all done at 600 (rough figures but you get my drift).

Feed the 7 Rem Mag something like a 162 Amax (some Bergers?),and we're still above 1900 fps at 800 yards.Those high BC boys know whereof they speak when it comes to stretching things out.

Not factored in is the generally faster twist of the 7mm barrels,coupled with higher velocity,both of which contribute to bullet expansion.But the tables won't tell us that.

In real life, I've fired enough (say) Bitterrots weighing 130,140,160,165 grains from various standard and magnum cases to say that the magnum cases expand those bullets better at 300 yards and beyond. This is definitely the case comparing the 270,280 and 7 Rem mag;and the 300 Win Mag vs the 30/06.

Even if we don't shoot beyond 500-600 yards,the advantage is there whether we need it or not.

There are solid reasons that 7mm magnums are pretty popular LR elk cartridges.It's mechanics as much as anything else.The faster a bullet is going when it hits something, the more it's going to expand