Weatherby Load help??

slammedsi · September 14, 2011, 10:53 PM

Loading 257 Weatherby mag. The combo i want to use is. Barnes 100Gr TSX, Rl-22 and CCI 250 primers. I have loaded in the past 66.7grs for this combo. I dont have a manual for this bullet/powder. So my question is, Would any of you fine folks have a Min/Max for said bullet, powder? I was thinking that something like 69grs was max. But after doing several hrs of research online i find people loading from 72-75.5. Sorry for the lack of grammar or punctuation haha.

slammedsi · September 15, 2011, 09:27 AM

Ttt, any help would be great. I've got 60 cases cleaned, sized, and primed. All ready for a charge.

A_Gamehog · September 15, 2011, 04:34 PM

Barnes has load data on their site. The primers do matter, use the 215M as they all recommend. I like IMR4831, the amount of powder is specific to your
and chamber size. Start low and work up. My experience with the Weatherby 300 is don't go over the max loads as listed.

The Barnes book #4 lists:

Reloader 22 and the 100 grain TSX, 66 grains min=3375fps. to 71.0 max.=3595fps

http://www.barnesbullets.com/wp-cont...MagnumWeb2.pdf

slammedsi · September 15, 2011, 04:51 PM

Thanks game hog. I went over there site first. But didn't find the listing for the 100gr tsx and to-22. Does your Barnes #4 list the used primer?

langenc · September 15, 2011, 06:29 PM

Check alliants (Reloader) site or call Sierra bulletsmiths.

They will give recommendations on anybodies powder/primer/bullets not just their own..

OR get a copy of LOADBOOKS for your calibers. They have all data by all bullet/powder makers in one about $8 book..for each caliber.

slammedsi · September 15, 2011, 08:44 PM

Thanks for the advice. LOADBOOK is on its way. Anyone else have some advice for me?

A_Gamehog · September 15, 2011, 11:03 PM

Quote:

Does your Barnes #4 list the used primer?

Case: Weatherby
Primer: FED GM215M > this does matter<
Twist 1:10
Barrel 24"

100 TSX = 370 BC

From Barnes #4 load book

Other powders tested
IMR 4831 63.0-68.0
XMR 3100 64.0-68.5
IMR 7828sc 66.0-71.0
H1000 70.5-75.5 (most accurate powder tested)
Magnum 71.5-76.0

slammedsi · September 16, 2011, 07:39 AM

Thanks for helping me out Game hog. Thats just what i was looking for. I guess its time i make the trip to town to get some 215M primers.. Thanks again.

September 15, 2011, 04:34 PM	#3
A_Gamehog Senior Member Join Date: February 9, 2009 Location: Central Oregun Posts: 563	Barnes has load data on their site. The primers do matter, use the 215M as they all recommend. I like IMR4831, the amount of powder is specific to your and chamber size. Start low and work up. My experience with the Weatherby 300 is don't go over the max loads as listed. The Barnes book #4 lists: Reloader 22 and the 100 grain TSX, 66 grains min=3375fps. to 71.0 max.=3595fps http://www.barnesbullets.com/wp-cont...MagnumWeb2.pdf __________________ "Happiness is knowing the Barred Owl is Eating the Spotted Owl and environmentalists are watching Nature take it's course"

September 15, 2011, 06:29 PM	#5
langenc Senior Member Join Date: August 19, 2007 Location: Montmorency Co, MI Posts: 1,551	Check alliants (Reloader) site or call Sierra bulletsmiths. They will give recommendations on anybodies powder/primer/bullets not just their own.. OR get a copy of LOADBOOKS for your calibers. They have all data by all bullet/powder makers in one about $8 book..for each caliber.