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Author Topic: new 257 caliber bullet  (Read 13085 times)

Offline Jonathan_S

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Re: new 257 caliber bullet
« Reply #15 on: July 05, 2018, 10:06:33 PM »
Lots of overbore quarter bores out there. Wish these came out several months ago when I was rebarreling a .25-06

Tough to find twist rates faster than 1:10” but these should help change that
Kindly do not attempt to cloud the issue with too many facts.

Offline mountainman

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Re: new 257 caliber bullet
« Reply #16 on: July 05, 2018, 10:31:36 PM »
Might try these in my Ackley improved '06
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Offline yorketransport

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Re: new 257 caliber bullet
« Reply #17 on: July 06, 2018, 06:17:52 PM »
Lots of overbore quarter bores out there. Wish these came out several months ago when I was rebarreling a .25-06

Tough to find twist rates faster than 1:10” but these should help change that

That's why I'm glad that they're offering barrels with an appropriate twist rate too. I ordered up a 1-7" X-Caliber blank from them since they're on sale for  $199 right now. I haven't had any of the X-Caliber barrels but I know a couple people who've been using them for a while with good results. I'll nail down what to do with it later I guess.

Offline Biggerhammer

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Re: new 257 caliber bullet
« Reply #18 on: July 06, 2018, 08:17:03 PM »
Just ordered a X-Caliber myself, from Blackjack. $214.00 Shipped is a great deal. I have had great accuracy with them when it comes to AR15 and AR10 barrels.

I had a reamer done by Dave Kiff some time back. My version of a .25 Souper, just more case capacity. Minimum body tapper. Shoulder blown forward (37 Degree). That’s a .243 case sitting under the reamer.

I like short action 25’s. I had a .257 DGR when Duane first did them and a 25 Souper years back. Shot allot of Chucks with them.

« Last Edit: July 06, 2018, 08:42:57 PM by Biggerhammer »

Offline yorketransport

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Re: new 257 caliber bullet
« Reply #19 on: July 06, 2018, 08:24:42 PM »
My PRS superstar friend has shot out 2 X-Caliber barrels so far and he’s working on a third. They’ve shot extremely well but they do copper foul worse than a premium barrel.

Offline yorketransport

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Re: new 257 caliber bullet
« Reply #20 on: July 18, 2018, 09:22:05 PM »
Just found out today that the guys at Blackjack Bullets have their X-Caliber blanks marked down even more. Using the coupon code “longrange257” takes the price down to $179 for a contoured blank.

https://www.longrangehunting.com/threads/barrel-blank-coupon-code-price-too-low-to-show.205155/

I’m thinking of grabbing a magnum sported contour to go with the Sendero profile I ordered last week.

Offline Biggerhammer

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Re: new 257 caliber bullet
« Reply #21 on: July 18, 2018, 09:54:09 PM »
Thanks for spending another $200.00 bucks for me.

Offline Jonathan_S

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Re: new 257 caliber bullet
« Reply #22 on: July 19, 2018, 06:23:29 AM »
Would be super interested in a .25-06AI to mess with these.  Regular -06 would do well but not get a little extra zip?
Kindly do not attempt to cloud the issue with too many facts.

Offline yorketransport

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Re: new 257 caliber bullet
« Reply #23 on: July 19, 2018, 07:02:16 PM »
Would be super interested in a .25-06AI to mess with these.  Regular -06 would do well but not get a little extra zip?

The 25-06 is boring, you need to be a guinea pig for my 257 BS (Boondoggle Short). :chuckle:

 6.5 Grendel on the left, 257 BS, 25-06.

Offline jasnt

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Re: new 257 caliber bullet
« Reply #24 on: July 19, 2018, 07:42:18 PM »
Maybe I missed it. What’s the boondoggle parent case?
https://www.howlforwildlife.org/take_action  It takes 10 seconds and it’s free. To easy to make an excuse not to make your voice heard!!!!!!

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline yorketransport

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Re: new 257 caliber bullet
« Reply #25 on: July 19, 2018, 07:51:46 PM »
Maybe I missed it. What’s the boondoggle parent case?

In keeping with my mission statement of using readily available brass and dies, the 257 BS is basically a 6.5 PRC necked down to 257. I formed that case from piece of 375 Ruger basic brass that I cut down, sized in a 338 RCM die, then a 300 RCM die, necked down to 270 with a 270 WSM die, then ran it into a 6.5 PRC bushing die that I just picked up on clearance for $28 from Midway with a .296 bushing first then followed up with a .289 bushing. It could also be made from cut down 8x68s brass.

I haven't decided if I want to use the 6.5 PRC case or use the 300 RCM case though. The 300 RCM would give a longer neck while the 6.5 PRC just makes the whole thing easier.

Offline jasnt

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Re: new 257 caliber bullet
« Reply #26 on: July 19, 2018, 08:13:37 PM »
Lol I enjoy doing that stuff. Never done anything with so many steps but I have made 243 brass from some mil 308 brass with one of my tests trying to get thicker brass. I think it would have been better if I had turned necks.
https://www.howlforwildlife.org/take_action  It takes 10 seconds and it’s free. To easy to make an excuse not to make your voice heard!!!!!!

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline Jonathan_S

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Re: new 257 caliber bullet
« Reply #27 on: July 19, 2018, 09:49:11 PM »
Would be super interested in a .25-06AI to mess with these.  Regular -06 would do well but not get a little extra zip?

The 25-06 is boring, you need to be a guinea pig for my 257 BS (Boondoggle Short). :chuckle:

 6.5 Grendel on the left, 257 BS, 25-06.


I like the look of that. Plus I’ve been thinking about what to rebarrel a short action with that isn’t “boring” or a WSM/SAUM

Might have to hit you up on that in a year or so.
Kindly do not attempt to cloud the issue with too many facts.

Offline jasnt

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Re: new 257 caliber bullet
« Reply #28 on: July 20, 2018, 05:14:04 AM »
Would make one heck of a 6mm
https://www.howlforwildlife.org/take_action  It takes 10 seconds and it’s free. To easy to make an excuse not to make your voice heard!!!!!!

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline Angry Perch

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Re: new 257 caliber bullet
« Reply #29 on: July 20, 2018, 09:29:48 AM »
Maybe I missed it. What’s the boondoggle parent case?

In keeping with my mission statement of using readily available brass and dies, the 257 BS is basically a 6.5 PRC necked down to 257. I formed that case from piece of 375 Ruger basic brass that I cut down, sized in a 338 RCM die, then a 300 RCM die, necked down to 270 with a 270 WSM die, then ran it into a 6.5 PRC bushing die that I just picked up on clearance for $28 from Midway with a .296 bushing first then followed up with a .289 bushing. It could also be made from cut down 8x68s brass.

I haven't decided if I want to use the 6.5 PRC case or use the 300 RCM case though. The 300 RCM would give a longer neck while the 6.5 PRC just makes the whole thing easier.

Sounds like a Rube Goldberg wildcat!
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