257 WBY vs. 300 WBY

[257 Wby Mag]

That would be interesting to do Jack. Curious to see what 2'' does, or doesn't....

[257 Wby Mag]

You keep stating %'s and efficentcy clues Josh. Think of it as a hot rod or a big truck. I'll never forget when I got my new Titan. My old man asked what it got for fuel milage one day. Looked at him and told I didn't know? He bout *censored*!! Told him I got it for pullin the horse trailer and camp trailer, didn't care what kinda milage it got....grin...

[JoshT]

Hey... I shoot a .300 RUM too... so efficiency isn't my thing either. I'm just saying... that ain't much extra juice for a whole lot more squeeze. If you're willing to put it in your pipe and smoke it for 5" at 500 yards... then it is what it is. Not bad mouthing the Roy at all... it's a hell of a round... like I said... I wouldn't sell one to buy the other. I've killed twice as many critters with the .25-06... than all the rest of the calibers I've used combined... 3300-3600fps .25 cal pills kill stuff as fast (or faster) than anything I've ever seen... the Roy is just more (a little more) of a good thing.

If we do have a little get together it would be cool to actually see what some of these loads do over the same chrony... it would give a pretty good idea of what's what.

[257 Wby Mag]

300 RUM?? Come on, why not a 300 win mag ain't much juice for a whole lot more squeeze. grin.....  See what I'm saying?

[jackelope]

If we do have a little get together it would be cool to actually see what some of these loads do over the same chrony... it would give a pretty good idea of what's what.

we need to work on that.

[257 Wby Mag]

If we do have a little get together it would be cool to actually see what some of these loads do over the same chrony... it would give a pretty good idea of what's what.

we need to work on that.

Got my bench and swingers built finally. We can get 600 yards right here at my place. Maybe this summer we can do a shoot, get a couple differant chrony's rollin and compare notes between a few of us?

[JoshT]

Ahhhh... but there's one big difference... the ability to step up and shoot the heavies... that's where the efficency comes back. You can generate a great deal more downrange punch by shooting a much heavier and ballistically efficient projectile... that's where the "efficiency" comes in.

With the 300 RUM I can run 210 Bergers at 3150 using 93 grains of powder... at 500 yards that's 2800fpe... or about 30fpe/grain of powder.

With the .300 Winny you can run 210 Bergers at about 2800 using around 75 grains of powder... at 500 yards that's 2100fpe... or about 28fpe/grain.

Sooo... using 25% more powder I get 33% more downrange punch... that's actually MORE efficient.

The same can't be said for the .257 vs. the 25-06 (using your numbers from Nosler):

The option to step up in bullet weight beyond the capacity of the case... really isn't there like it is with the big .30s. 115-120s is about all you get.

Running the 100 NBT... the .257 beats the 25-06 by a measly 200fpe at 500 yards... and the does it for about 19fpe/grain... vs. the .25 at 21.5fpe/grain.

Soooo.... using 33% more powder you get only an 18% increase in punch downrange... that's LESS efficient.


I do agree that at some point it efficiency is moot... I love running the 55 grainers out of the 6mm at 4100... and it takes 55 grains of 414 to git-r-done... when powder charge is equal to bullet weight... THAT'S when inefficient gets FUN.

[257 Wby Mag]

LOL!! Come on Josh, you really think a critter is gonna notice the fpe? After all, a monkey can turn a dial!! grin

Ya, I've been killing deer and coyotes for years with 55 NBT's. Pure magic... I use H380 in both 6mm and 243. Still can't hang with a 257 when it comes to eating distance and dealing hurt......

[JoshT]

They do notice that difference... 800fpe is one thing... 200 is another.

Them 55s eat up some ground in a hurry though don't they? I'll never forget the first time we shot them outta the ol'6mm... it was out at Plantation south of Bellingham. My buddy was running the rifle and I was a couple benches down on the spotting scope... at 300 yards I could see bullet impact in the dirt berm behind the target... BEFORE I heard the gun go off... that, is haulin' some serious ace!

[257 Wby Mag]

I am going to purchase a Weatherby rifle this year.  I can't decide between the 257 or the 300.  I'm leaning toward the 300 because I already have a 25-06.  The 300 is a great all around cartridge, but the 257 is a real performer also.  I will be hunting mostly deer with this rifle.  I just thought I'd ask you guys your opinion.  Which do you prefer and why? 

Sorry we hi-jacked your thread. I stick to my words, for straight buck, antelope, coyote killin, the 257 Roy is hard to beat!! Weather its 50fps or 500fps over the 25-06, it still beats, hands down from a performance stand point. 300 Roy you could shoot 150's stupid fast too. Pick your round. 300's alot more versitile.

[257 Wby Mag]

They do notice that difference... 800fpe is one thing... 200 is another.

Them 55s eat up some ground in a hurry though don't they? I'll never forget the first time we shot them outta the ol'6mm... it was out at Plantation south of Bellingham. My buddy was running the rifle and I was a couple benches down on the spotting scope... at 300 yards I could see bullet impact in the dirt berm behind the target... BEFORE I heard the gun go off... that, is haulin' some serious ace!

Hmmm, energy is a funny thing. Think it kills game, or a proper boolit producing massive hemmorging? I'll never forget a 90 pound spike buck one day. Shot through both front shoulders less than a 100 yards with a 7 mag, 150 cor lokts, running off for 150 yards before expireing. He didn't feel the 3000 fpe? Wouldn't all that energy pick a 200 lb animal up and throw it? Yes, energy is a funny thing......

[JoshT]

Not unless it picked up the 200 lb shooter (c'mon man... we both go WAY more than 200) and threw him too. Physics is a bitch when it ain't your friend. All this is assuming proper bullets... of course.

It does beat it... though not the Ike on Tina kind of beating that most people assume.

[257 Wby Mag]

Laffin. So, at 800 yards, is your RUM gonna kill a buck faster than a 300 winny firing 210 grainers? Methinks not........

[257 Wby Mag]

Here's some 55 grain carnidge for ya Josh. grin....

[JoshT]

Here's a new sticker for you... grin!