Reloading Share techniques for reloading, where to get the hottest in reloading equipment and learn how to reload from fellow hunters.

.257 weatherby

Old 06-26-2009, 04:05 PM
Thread Starter
Join Date: Jun 2009
Posts: 46
Default .257 weatherby

anyone got any load data for the .257 weatherby?I would like to load mostly berger bullets if i could but any info is welcolmed!THanks!!

Im also looking for 257 wby brass so if anyone has some they would be willing to sell pm me..thanks..
WBYSAGE is offline  
Old 06-27-2009, 06:28 AM
Nontypical Buck
Join Date: Nov 2008
Location: Adirondacks
Posts: 1,305
Default RE: .257 weatherby

Try these-
Good luck!
Bernie P. is offline  
Old 06-27-2009, 07:02 PM
Nontypical Buck
driftrider's Avatar
Join Date: Feb 2003
Location: Coralville, IA. USA
Posts: 3,802
Default RE: .257 weatherby

The following is a 1/2 MOA load for my Rem 700 LSS .257 Wby. 71gr IMR-7828, 100 grain Barnes Tipped TSX bullet, seated to max COAL (the number slips my mind right now), lit by a CCI benchrest magnum primer.

As for brass, you're on your own there. The little brass I have I had to make from both 270 Wby and 7mm Rem Mag. Actual 257 Wby headstamped brass is very hard to come by these days. I'd suggest that you make your own, either by buying 270 Wby brass and necking down (a one step operation with just your 257 FL die), which make perfect 257 Wby brass. Or you can make some with 7mm Rem Mag brass (this is the budget way to do it). Just run NEW 7mm Rem Mag cases through your FL sizer die using Imperial Sizing Wax on the neck and shoulder to prevent crushing. My success rate was 98%, with one case in 50 getting the shoulder creased. The 7mm Mag brass forms the neck and a partially radiused shoulder, but the full Wby double radius isn't formed by the die. The next step is just load them up with about a 5% reduced charge (I used 67 grains IMR-7828 for fireforming with the 100 gr TTSX bullets). After firing the rounds come out as sharply formed 257 Wby cases with slightly shorter necks than the Wby brass, which really isn't a big deal. I've gotten just under 1" groups average with these fireform loads, but the Roy likes it better when I push them harder to the 71 grain mark, where it really starts to shine.


driftrider is offline  
Old 06-28-2009, 11:35 AM
Fork Horn
Join Date: Jan 2007
Location: Idaho's Elk Country
Posts: 275
Default RE: .257 weatherby

I'd look at H1000, H4831, Retumbo, R-25, or 7828 under the 115 Berger and ignited by a magnum primer

As for brass just buy some 7RM if you can't find 257. One drop of the press and wala....257Roy!
hunter5325 is offline  
Related Topics
Thread Starter
Last Post
01-26-2009 05:53 PM
09-08-2008 11:04 AM
06-25-2007 10:24 AM
12-05-2006 09:27 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Quick Reply: .257 weatherby

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.