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You lucky readers! After years and years of infield research I now know the ultimate cartridge for deer/sheep/pronghorn size critters! Additionally I have carefully assembled from my field notes all the facts you need know about ballistic coefficients, bullet weight, velocity required at sensible hunting ranges (let’s put max at about 400 yds.).
So here you have the ultimate numbers:
B.C. .390-.453
Bullet weight 115-120 grain
Velocity 3000 FPS
What those numbers make you yawn? They don’t approach many of today’s modern cartridges.
Well record book Pronghorn and Rocky Mountain Sheep and several Mule and Whitetail Deer, Javelina and a Black bear wish I had never discovered the 257 Roberts!

BP-B2

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I use my 25-06 for Pronghorn & Deer.

I get the same ballistics as you do in your Roberts.

Good round!

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I have Whitetail hunted with the Bob for 20 years now. I killed my only buck mount on the wall with it.

I could talk about cartridges for hours, but I'm older and know nobody really cares so I'm gonna play the guitar a while and relax.

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Desertranger,
I like the way you think. 😁


"No good deed shall go unpunished!"
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I have the .257 improved aka 6.5 Creedmoor.

IC B2

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Originally Posted by Desertranger
You lucky readers! After years and years of infield research I now know the ultimate cartridge for deer/sheep/pronghorn size critters!


Well yeah, but what really counts is the outfield research.

VarmintGuy is that you……..?


Casey

Not being married to any particular political party sure makes it a lot easier to look at the world more objectively...
Having said that, MAGA.
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Originally Posted by Blackheart
I have the .257 improved aka 6.5 Creedmoor.

[Linked Image from i.imgur.com]


l told my pap and mam I was going to be a mountain man; acted like they was gut-shot. Make your life go here. Here's where the peoples is. Mother Gue, I says, the Rocky Mountains is the marrow of the world, and by God, I was right.
- Del Gue
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This little buck agrees with the OP.

[Linked Image from i.imgur.com]

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It's always been the Bob. Today we have better Bob bullets to make it awesomer....


It's you and the bullet, and all the rest is secondary.
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When I saw the ultimate cartridge title, I thought someone resurrected Mule Deer’s B-29.

I guess the Roberts is OK too….

Old70

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Originally Posted by High_Noon
Originally Posted by Blackheart
I have the .257 improved aka 6.5 Creedmoor.

[Linked Image from i.imgur.com]

Not sure what scares me most, that photo or the fact that you had it on your computer... wink

Last edited by OSU_Sig; 10/20/21.

There are 2 rules to success:

1. Never tell everything that you know.
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Cartridges that are nearly 100 years old don't work anymore. All that history doesn't mean a thing. If it wasn't designed in the 21st century it doesn't count.


I am continually astounded at how quickly people make up their minds on little evidence or none at all.
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The .257 is a good one.
These days, it is seldom seen or heard about and
It meets all the requirements of a deer/ sheep rifle.
Just my style, which means, it is not short and fat, keeps a gentle shoulder angle and a longer neck.
A 1/4 bore these days doesn't capture the attention of the " IN" crowd . It is a hunter's round.

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Originally Posted by Blacktailer
Cartridges that are nearly 100 years old don't work anymore. All that history doesn't mean a thing. If it wasn't designed in the 21st century it doesn't count.



I'll stick with my 30/06.

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Originally Posted by Blacktailer
Cartridges that are nearly 100 years old don't work anymore. All that history doesn't mean a thing. If it wasn't designed in the 21st century it doesn't count.


I respectfully disagree.

M. Quigley


I am..........disturbed.

Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain


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Originally Posted by Desertranger
You lucky readers! After years and years of infield research I now know the ultimate cartridge for deer/sheep/pronghorn size critters! Additionally I have carefully assembled from my field notes all the facts you need know about ballistic coefficients, bullet weight, velocity required at sensible hunting ranges (let’s put max at about 400 yds.).
So here you have the ultimate numbers:
B.C. .390-.453
Bullet weight 115-120 grain
Velocity 3000 FPS
What those numbers make you yawn? They don’t approach many of today’s modern cartridges.
Well record book Pronghorn and Rocky Mountain Sheep and several Mule and Whitetail Deer, Javelina and a Black bear wish I had never discovered the 257 Roberts!



That's a sweet spot, for sure. (PS: Don't tell Stick!)

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Desertranger,

As you know, I have some acquaintance with that cartridge, and so does Eileen. Below are some of the western big game animals we're taken with it over the decades. The first is a pronghorn buck I got in 1988, taken at around 450 yards with a 100-grain Nosler Partition. Back then we didn't know that you had to use high-BC bullets in 6mm or 6.5mm to shoot antelope at over 250 yards, so I loaded the Partition pretty warmly and used my scope's plex reticle to estimate the range. The bullet landed right where intended, and by some miracle the buck fell over.

[Linked Image]

I got this mule deer about a month later, using the same rifle with a 120-grain Nosler Solid Base, range about 100 yards--a far more suitable distance for such an antique cartridge.

[Linked Image]

Eileen got this cow elk a few years ago with a more modern .257, using a more modern bullet, a 100-grain TTSX. It stood quartering away at 123 yards (we had a laser rangefinder), and at the shot dropped, flopped its head a couple times and lay still. It wasn't the biggest elk in that country, but wasn't a calf either/

[Linked Image]

We've taken a few other animals with the cartridge, some from other rifles, I would guess at least 50.


“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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The girls just hate my first Bob.

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

My son's first deer. He's the one who inherit this rifle when i'm gone. Too bad he's going to be much older when it happens!!!! ;-)

[Linked Image from i.postimg.cc]

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Darn! And I went and shot Pronghorn with .264 Win Mag, .45-90, .308, ,405 WCF, .45-70,and a couple that I can not remember.


CRS, NRA Benefactor Life Member, Whittington Center, TSRA, DWWC, DRSS
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I’m learning I don’t need a cannon to kill deer size game after watching grandkids kill deer and pigs dead with a 243. I’ve never owned a 257 Roberts, but I like a 25-06.

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