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257 weatherby load

 
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  #1  
Old 09-05-2012, 12:59 PM
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257 weatherby load

I just picked up a 257 weatherby in a trade, it came with alot of brass. Whats a good bullet and powder combo for hunting deer and antelope sized game?

Thanks guys
David F,
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  #2  
Old 09-07-2013, 10:00 PM
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Re: 257 weatherby load

Bump As I am interested n this as well.
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  #3  
Old 09-07-2013, 10:37 PM
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Re: 257 weatherby load

I run 73gr of h1000 or 71gr of RL25 in mine with 110gr accubonds
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Weatherby Vanguard 257wby
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  #4  
Old 09-08-2013, 12:18 PM
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Re: 257 weatherby load

I use IMR 4350 and Nosler 100 gr. BT. CCI mag primers...

Hogginking
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  #5  
Old 09-08-2013, 05:55 PM
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Re: 257 weatherby load

70gr of H1000 with the Berger 115's or 110 NAB's.

But I'm still not done with load development quite yet, but these loads are shooting 3/4 MOA. Still need a little tweaking to try to get 1/4-1/2 MOA.
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  #6  
Old 09-09-2013, 06:15 AM
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Re: 257 weatherby load

The following loads must be worked up to....your rifle may not respond the same. Have fired the norma 257 Weatherby brass four times with no primer pocket looseness or other signs of excessive pressure.

Barrel has over 800 rounds through it. It is now so worn that 115 VLDs are occasionally being damaged.


Switched to the 110 moly coated accubond which has no issues with integrity:

257 Weatherby: 28" #5 fluted SS Lilja 3 groove barrel, moly coated 110 accubond, .015" off rifling. (custom shorter throated chamber reamer)

75.5 gr of RL-25 vel 3615 fps

Then RL-33 came out:

moly 110 accubond:


unknown territory, started low with 76 gr for vel of 3318
jumped to 80 gr 3432 fps
81 gr 3525
82 gr 3559
83 3625 slightly faster than old load with RL-25
83.5 3674 fps shot well two shots were same velocity
84 gr 3704 fps shot well two shots were same velocity
84.5 gr 3735 this is max case capacity with 6" drop tube

Have shot the 84.5 gr load multiple times including temps in the low 90s with no pressure signs. Excellent accuracy tested out to 500M.
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  #7  
Old 09-09-2013, 07:32 AM
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Re: 257 weatherby load

my cdl likes 76 grains of re25 and a sierra 100 grain pro hunter with a fed match mag primer. It shoots ballitic tip 100s near as well with the same load. Its killed like the hammer of thor on long range whitetail.
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