what should i expect..257 Wby mag

[sniperjwt]

Alright i am getting ready (actually just wrote the check) to purchase some JLK bullets in 257. I have my recently acquired 257 weatherby mag begging me to shoot it. It is the Vandguard with the 24" barrel. Im just wondering if any of you guys have one and if you shoot any bullets around the same weight (108gr) what speeds are you getting. Im just curious as to how fast (aprox) will i be able to get them.

 

[LRSickle]

I have a 257 Wby Mag too. It's a stainless Vanguard Classic.
Expect to have to tune the trigger and lap the lugs. I also bedded the action and floated the barrel but it already shot well so it didn't make much difference.
My load, which always shoots around 3/4 inch, is:

100gr TSXs, 73.0gr RL22, 3725fps, COL 3.18, CCI LM primers

Recomended COL is 3.25. Mine is more accurate seated back from that. In this gun, with a Weatherby throat, that's a long f'in jump. But it is what it is.

I'm pretty happy with the volocity at 3725fps. I admit it's a hot load, but I get no high pressure signs unless it's a real hot day. RL22 is a very temp-sensitive powder.
Long Time Long Ranger is getting in the low 38XX fps in his .257. I'm not sure what his load is though. Maybe he'll chime in and give out.

You are going to be so happy with this caliber. I call it my .257Laserbee.

 

[sniperjwt]

hmmm. well that is faster than what i was expecting. I would have guessed i would be able to push the 108 gr to about 3450 but judging from you getting a 100 gr to 3725 i may be able to get it closer to the 3600fps range. This is getting better and better

 

[115vld]

Im shooting 115 Bergers at 3450 fps. Im pushing them with 68.5 gr of H1000 fed 215 mag primers. Out of a Wby Mk V left hand with 28" #8 Lilja 3 groove.
3.335 C.O.A.L. Loaded to fit magazine.

 

[Long Time Long Ranger]

My accuracy load out of a 26" barrel mk 5 wby is 75.5 grains of magpro with the 100 grain barnes tsx at 3780 fps. It shoots a 1" group at 400 yards. With retumbo I was getting 3845 fps but did not have as good accuracy and velocity spreads were greater. Since then I have tried the 100 grain swift scirroco with a much higher bc than the barnes and getting 3800 fps with it and magpro but the groups are twice as big, around 2" at 400 yards.

 

[royinidaho]

You should expect a lot of satisfaction......and you'll get it.

 

[sniperjwt]

You should expect a lot of satisfaction......and you'll get it.

That's what I like to hear

 

[Long Time Long Ranger]

For comparison my 257 STW with a 26" barrel gets 3850 fps with the 100 grain and 3600 fps with the 117 grain using about 8-10 grains more powder on average.

 

[mike33]

DEAD
I own 2 and very deadly on whitetail.
Rem 700
Hart 24"
McMillian Stock
Lupy 4.5-14 30mm B&C
100 gr. Sierra Bt 73 grains IMR 7828 Vel. 3650
Mike

 

[LRSickle]

I was aprehensive about posting my velocities with my 257 until Long Time Long Ranger posted his on another thread. Now I've looked around and we have pretty common speeds. Just be careful, as with any load, and you'll wind up with a screamin' , accurate gun.
And like royinidaho says, you'll get lots of satifaction.