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Reloading Berger Bullets


257 weatherby load

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Unread 09-05-2012, 12:59 PM
Silver Member
Join Date: Jan 2011
Posts: 153
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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Unread 09-07-2013, 10:00 PM
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Join Date: Aug 2012
Posts: 41
Re: 257 weatherby load

Bump As I am interested n this as well.
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Unread 09-07-2013, 10:37 PM
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Join Date: Nov 2010
Location: Ashflat, AR
Posts: 397
Re: 257 weatherby load

I run 73gr of h1000 or 71gr of RL25 in mine with 110gr accubonds
Weatherby Vanguard 7mmx300win (28 nosler reaming coming)
Weatherby Vanguard 270x300win in the works
Savage LRH 6.5x284
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Unread 09-08-2013, 12:18 PM
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Join Date: Dec 2012
Location: 4B
Posts: 30
Re: 257 weatherby load

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

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Unread 09-08-2013, 05:55 PM
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Join Date: Oct 2008
Location: Alabama
Posts: 9,952
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.
"I'm just a peckerwood who lives in the hills with too many guns..." - Bob Lee Swagger

"Give me a minute...I'm good. Give me an hour...I'm great. Give me 6 months...And I'm unbeatable." - Col. Hannibal Smith

Originally Posted by WildRose View Post
The 284 is to the STW what a tricycle is to a Ninja.
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Unread 09-09-2013, 06:15 AM
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Join Date: Dec 2005
Location: Tucson Az
Posts: 2,060
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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Unread 09-09-2013, 07:32 AM
Gold Member
Join Date: Feb 2012
Posts: 987
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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