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257 Wby Mag questions #14261074 11/06/19
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mark shubert Offline OP
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2 questions concerning the 257 Wby Mag

First (since all my books are still hidden in storage) I find NO starting load for IMR 7828 on Hodgdon's site. Recommended starting and max loads would be appreciated, along with recommended loads with this powder. (Buddy already bought it)

Second as he discovered he wound up with 1 pound of 7828, and another of 7828SSC - is there a difference in data between them?

Thanks in advance - Mark


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Re: 257 Wby Mag questions [Re: mark shubert] #14261113 11/06/19
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horse1 Offline
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Originally Posted by mark shubert
2 questions concerning the 257 Wby Mag

First (since all my books are still hidden in storage) I find NO starting load for IMR 7828 on Hodgdon's site. Recommended starting and max loads would be appreciated, along with recommended loads with this powder. (Buddy already bought it)

Second as he discovered he wound up with 1 pound of 7828, and another of 7828SSC - is there a difference in data between them?

Thanks in advance - Mark


You can fill that case with bullseye if you're not going to seat a projectile. Has he got a projectile in mind, or is it a secret?


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Re: 257 Wby Mag questions [Re: mark shubert] #14261121 11/06/19
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While I think Hodgdon says that they’re interchangeable, in my .270 Weatherby, I had to redevelop my loads when switching between them. I ended up decreasing loads a couple of grains when using the SSC version.

Re: 257 Wby Mag questions [Re: mark shubert] #14261134 11/06/19
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vapodog Offline
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My Hodgdon book lists the following for IMR 7828:

75 grain bullet...……...max load is 73 grains for muzzle velocity of 3824 FPS
87-90 grain bullet...…..max load of 71 grains for MV of 367 FPS
100 grain bullet...…….max load of 69 grains for MV of 3466 fps
117-120 grain bullet....max load of 67 grains for MV of 3324 fps

all starting loads are reduced 5 grains

Data manual # 26
I'd work up either powder but have not found any of the SSC powders from Hodgdon to be any different than the original powder.....except of course the length of the kernel

Last edited by vapodog; 11/06/19.
Re: 257 Wby Mag questions [Re: horse1] #14261144 11/06/19
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mark shubert Offline OP
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Originally Posted by horse1
Originally Posted by mark shubert
2 questions concerning the 257 Wby Mag

First (since all my books are still hidden in storage) I find NO starting load for IMR 7828 on Hodgdon's site. Recommended starting and max loads would be appreciated, along with recommended loads with this powder. (Buddy already bought it)

Second as he discovered he wound up with 1 pound of 7828, and another of 7828SSC - is there a difference in data between them?
.
Thanks in advance - Mark


You can fill that case with bullseye if you're not going to seat a projectile. Has he got a projectile in mind, or is it a secret?


Major OOPS - he's using a 100 gr Sierra BT spitzer (thinking Gameking)


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Re: 257 Wby Mag questions [Re: mark shubert] #14261360 11/07/19
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JPro Offline
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Using Hornady brass, my factory 24” Vanguard makes 3,600fps shooting 100gr bullets (Etip and Swift S2) over 72.5+/- grains of regular 7828. I worked up from 71gr (3500fps).


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Re: 257 Wby Mag questions [Re: JPro] #14261386 11/07/19
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And my last Hodgdon manual (2015) goes up to 73gr with Wby brass and the 100gr Speer BT. They got 3655fps from a 26” tube. No starting load listed.

Hodgdon also has their data online.....


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Re: 257 Wby Mag questions [Re: mark shubert] #14262492 11/07/19
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DoubleRadius Offline
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The OP asked for starting data.....

Speer #15 lists a starting load for 100 grain bullets of 67.0 grains of IMR7828 and a CCI 250, giving 3306 fps.

Hornady #9 Lists a starting load for 100 grain bullets of 60.3 grains of IMR 7828 SSC and a Fed 215, giving 3100 fps.

Nosler #5 lists a starting load for 100 grain bullets of 65.0 grains of IMR 7828 and a Fed 215, giving 3237 fos.


.

.

Re: 257 Wby Mag questions [Re: mark shubert] #14262517 11/07/19
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pete53 Offline
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Major OOPS - he's using a 100 gr Sierra BT spitzer (thinking Gameking)

>>you need a better bullet like 100gr.Nosler Partition,Swift A-Frame,Barnes bullet those 100 grain sierra bullets will blow big holes in animals or just blow up and not penetrate well. trust me i have been shooting 257 Weatherby Mag.s a long time use a better bullet

Re: 257 Wby Mag questions [Re: mark shubert] #14262548 11/07/19
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OP asked for both starting and max data, and my research of this same matter a few weeks ago revealed 73gr as max from several sources, including folks here on the forum. Of course, chambers, barrels, bullets, brass, and powder lots vary, so one should always work up, preferably with a chronograph.


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Re: 257 Wby Mag questions [Re: mark shubert] #14268636 11/10/19
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Mark,

Steve's reloading pages: http://stevespages.com/257_10_100.html


7828, starting load 64 grains, Max load 78 grains....100 grain bullet...

even with my reload manuals out of storage, I have been consulting this site, for probably the last 12 to 15 years first...




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Re: 257 Wby Mag questions [Re: pete53] #14269212 11/10/19
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Originally Posted by pete53


Major OOPS - he's using a 100 gr Sierra BT spitzer (thinking Gameking)

>>you need a better bullet like 100gr.Nosler Partition,Swift A-Frame,Barnes bullet those 100 grain sierra bullets will blow big holes in animals or just blow up and not penetrate well. trust me i have been shooting 257 Weatherby Mag.s a long time use a better bullet

I'll second this statement. I'm a huge 257Wby fan, and a Sierra fan as well, but I would never recommend mixing the two. The velocity provided by the Wby calls for a tough, premium bullet - unless your buddy never plans to take a shot closer than about 250yds. It's a rare hunter that can say that and mean it. One of the longest trailing jobs I ever experienced was after a 50yd broadside shot using the cheap 100gr SP Weatherby factory ammo. It exploded and didn't penetrate. It had worked fantastically up until that point when all my shots had been across bean fields at 250+ yards. I switched to handloads using the 100gr Barnes TTSX. No more issues, near or far.


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Re: 257 Wby Mag questions [Re: pete53] #14269352 11/10/19
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Originally Posted by pete53


Major OOPS - he's using a 100 gr Sierra BT spitzer (thinking Gameking)

>>you need a better bullet like 100gr.Nosler Partition,Swift A-Frame,Barnes bullet those 100 grain sierra bullets will blow big holes in animals or just blow up and not penetrate well. trust me i have been shooting 257 Weatherby Mag.s a long time use a better bullet


+1. If you plan on big game hunting (and why else would you shoot a 257 WBY?), then you are going to want a tough bullet to deal with the ultra high velocity, at least at any sane distance.

Re: 257 Wby Mag questions [Re: mark shubert] #14271962 11/11/19
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The Sierra BT is one of their tougher bullets. It can still shed it's core at Weatherby velocities but for load work up and longer ranges it should do fine. For general use I would also choose a mono, bonded or partition bullet. The monos are good for less meat damage but still drop an animal PDQ.

There was one post on culling in Australia with I believe the 80 grain Barnes 257W and they thought it was a bad combo. This is difficult for me to believe after seeing how well the 100 grain Barnes worked, but I believe they shot several 100 animals and all who used it universally condemned it.


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Re: 257 Wby Mag questions [Re: mark shubert] #14274203 11/12/19
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In my 257Wby, I'm able to use 100gn SGK's and 100gn TSX interchangeably regarding POI out to 500yds, so I often practice w/the SGK's.

The SGK's positively "KERSPOLODE" on steel out to 500yds. The SGK would be well down the list of bullets I'd choose for hunting with a 257Wby. It's not that I couldn't, I just wouldn't.


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Re: 257 Wby Mag questions [Re: mark shubert] #14274223 11/12/19
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pete53 Offline
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myself i like Reloader 22 powder works better in my 257 Weatherby Mag fills the case better and has been a reliable hunting load here in Minnesota when its cold too. but i now only use good bullets for hunting Nosler Partitions or Swift A-Frame and there are some other good choices too.good luck,Pete53

Last edited by pete53; 11/12/19.
Re: 257 Wby Mag questions [Re: mark shubert] #14274239 11/12/19
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Forgot to mention, Ramshot Magnum has given me the best velocity, accuracy, and consistency. The last 5 I ran over the Chrono back in Aug showed an extreme spread of 27 and SD of 8. The stuff meters like a dream through a Culver style measure as well. Should easily be able to get +/- .2gn with just about any dropper and consistent technique, my Harrell's is +/- .1 with Magnum.


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Re: 257 Wby Mag questions [Re: pete53] #14274415 11/12/19
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Originally Posted by pete53
Major OOPS - he's using a 100 gr Sierra BT spitzer (thinking Gameking)>>you need a better bullet like 100gr.Nosler Partition,Swift A-Frame,Barnes bullet those 100 grain sierra bullets will blow big holes in animals or just blow up and not penetrate well. trust me i have been shooting 257 Weatherby Mag.s a long time use a better bullet

My brother in law shot a small deer at about 100 yards using a fairly hot load with a .243 with 100 gr. SGK. The deer took off showing no sign of being hit. I knew the usual escape route and I found it 300 yards away on the neighbor's place. The bullet had turned into shrapnel on contact. A .257 Weatherby is bound to be worse. I have used 165 gr. SGK in a .30-06 with good results.


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Re: 257 Wby Mag questions [Re: mark shubert] #14274441 11/12/19
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We asked somebody to quit hunting on our property with 100 SGK loads in a .243win, as they were losing too many deer and hogs with zero blood trail. No way I'd want them in a 100gr/.257wby.


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Re: 257 Wby Mag questions [Re: JPro] #14274443 11/12/19
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Originally Posted by JPro
We asked somebody to quit hunting on our property with 100 SGK loads in a .243win, as they were losing too many deer and hogs with zero blood trail. No way I'd want them in a 100gr/.257wby.


Were you able to gather any good information as to the location of the hits?


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