257 Weatherby with 80 TTSX loads

[KurtB]

Looking at running these 80 TTSX in my 257. Anyone loaded these yet and if so, what powders would be recommended? I have RL19, RL22, RL25, H1000, H4831 all on shelf now. Hoping to hit 3850 to 3900 out of a 26" tube. Thank you

 

[Hondo64d]

Looking at running these 80 TTSX in my 257. Anyone loaded these yet and if so, what powders would be recommended? I have RL19, RL22, RL25, H1000, H4831 all on shelf now. Hoping to hit 3850 to 3900 out of a 26" tube. Thank you

3850 was pretty easy in my .257 Wby, but my best accuracy came with 71gr 7828 and the bullet seated pretty short, 3.130" OAL. This load chronoed at a hair over 3700 and averaged just over .5" at 100 yards. Killed my largest whitetail, my 1st pronghorn and a big boar with it. Worked great.

John

 

[KurtB]

Very nice. I have some 7828 also. Did you get an exit on that boar and what was your distance? Thank you

 

[Hondo64d]

Got an exit on the boar (125 yards) and the pronghorn (277 yards), but not the whitetail (100 yards), which I shot square in the chest as he faced me dead on.

FWIW, my rifle preferred 7828 with every bullet I tried.

John

 

[HOBO270]

I reload the 80, 100, and 115 TSX all with good results. I also bought a box of factory loaded 80 TSX from Weatherby, and to my surprise they shot .80" with a MV of 3963 fps. For reloading the 80 TTSX, I use Fed. 215 and load 75 gr. of RL22. OAL is 3.130". Average group is .75 with a MV of 3845 fps. No pressure signs at all. I would just shoot the factory load but the $70 price tag is a bit much. That's not including the shipping. I'm going to bump the above load by .5 gr. and see if I can come close to an even 3900 fps. Right now I'm still working on 100 TTSX load. IMR4831 is showing a lot of promise.

 

[Long Time Long Ranger]

All I shoot in mine are 100 ttsx's at 3765 fps with magpro powder.

 

[HOBO270]

You know, Mag Pro is the only powder I have been wanting to try but have not yet. The 100 TTSX is my favorite bullet, and my goal is to get this bullet to 3650+ and shooting .5. I'm real close, but not quite there yet. I guess I'll just have to order some Mag Pro tonite. How many grains are you loading to get that much velocity? I'm shooting a Blaser R93 with a barrel length right at 25.75". I haven't had a load yet to show any pressure. RL19 and RL22 drove me nuts, so maybe Mag Pro will shine with a 100 TTSX.

 

[Long Time Long Ranger]

75 grains magpro and a cci 250 primer. 26" wby mk5. Will shoot a 1 1/4" group at a 1/4 mile. my son shot a group just over two inches last year at over 600 yards getting ready for antelope.

Make sure your gun has freebore or this load will blow out your primer pocket. not for rifles without wby freebore.

 

[KurtB]

Wow, what velocity on that magpro? Looks like that and RL22 will get first run with these guys. Needing to get mcmillan bedded and then will get shooting.

 

[HOBO270]

No problem with freebore. I can barely seat my bullets in the case and it's still nowhere close to the lands.