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Originally Posted by gunner500
I have an old 1954 12 twist FN 257 Mag, it loves 100gr A Frames and TTSX's with blue tips removed, the load is an easy 3500 fps with 65gr Norma 204 powder, that modest powder charge is easy on the throat, keeps barrel heat down and doesn't have near the muzzle blast as buds 257 Mag. using 80gr in his loads with another powder, i have only shot three or four deer and pigs with that rifle, they will melt before your eyes, next to no recoil lets you stay in the glass and see it all.
Great Info, Thank you!

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Originally Posted by jmp300wsm
I have always used RE22, CCI mag primers and 100 gr. TTSX at 3700 fps. Have killed a pile of critters, elk, deer, antelope and all DRT. Punches WAY over its weight limit.
Nice, I've always been a fan of the TTSX's.

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Originally Posted by Azshooter
Five of us use RL-25 or RL-33 with the 115 Berger. Either one makes them scream.

As for load data:

Nosler:
https://www.nosler.com/load-data/caliber-and-cartridge-data.html

Hodgdon:
https://www.hodgdonreloading.com/

https://alliantpowder.com/reloaders/RecipeList.aspx?gtypeid=2

https://www.speer.com/reloading/rifle-data.html

Plus if you download the hornady app you can get loading data for a single cartridge for 99 cents or all of the data for $19.99. Of course there’s the hardback version also.

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Originally Posted by ChanceD
Originally Posted by gunner500
I have an old 1954 12 twist FN 257 Mag, it loves 100gr A Frames and TTSX's with blue tips removed, the load is an easy 3500 fps with 65gr Norma 204 powder, that modest powder charge is easy on the throat, keeps barrel heat down and doesn't have near the muzzle blast as buds 257 Mag. using 80gr in his loads with another powder, i have only shot three or four deer and pigs with that rifle, they will melt before your eyes, next to no recoil lets you stay in the glass and see it all.
Great Info, Thank you!


You're most welcome, those early FN Southgate Weatherby's sure are some cool old rifles, Roy really put a lot into their builds, good luck getting your rifle up and smoking some game this season.


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Using the Barnes 100gr TTSX, I've tried 7828, Magnum, H1000, and Retumbo. In a SS Vanguard MOA. Best accuracy with H1000 and Retumbo but Retumbo is slightly faster. Norma/Weatherby brass, Fed 215 primer. Mule Deer's favorite load uses the 100gr Nosler E-tip and H1000. Search this site to find the exact load. Good luck! Mark and Belle

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I can provide a little range update for my trip the range with some test rounds using IMR 4831 and the TTSX 100 gr bullet from Barnes. I used the CCi 250 LRM primer. OAL was 3.17 inches. I loaded 63gr, 64 gr, 65 gr 65.5 gr and 66 grain. I chose these loads because most research I have done shows the best loads at 1.5 to 2 grains over book max and I wanted to work up to that range. I stopped there because I only had 15 rounds of brass ready. The Barnes Load Data had max loading at 64 grains for 3842 fps. I do not have a chronograph.

Loads 63gr, 64 gr and 65 grain all shot to the same poi roughly and were all submoa. 65.5 and 66 shot to a poi of 1.5" higher and the groups widened to about 1.5 MOA. I did not see any pressure signs with any of the charges.

63 gr was 0.81", 64 gr was 0.66" and 65 gr was 0.48". There is a giant asterisk around 65 gr because it was only 2 shots who grouped just liked previous charges and in the same spot. The third shot was distracted as some paper on the back stop blew in front of my target just as I was releasing....

65.5 gr shot to 1.61" and 66gr shot to 1.58".

My plan is to load to the 64 gr book max, in the center of a 2 grain window that all shoots similar. At 3500 fps, it should be enough of the good stuff to work reliably.

Rifle is a Weatherby Accuguard. Hopefully these same rounds will shoot great in my CLR when I get it back from Melvin soon.

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