257 weatherby
- Thread starter sage rat
- Start date
That sounds like more work than its worth and would probably result in a shorter barrel due to having to set the barrel back to get past the freebore.
As for brass I suggest you just spend the money and do it right. I tried resizing seven mag brass but it resulted in more work than I wanted. Necks needreaming and they shot well while using new brass just run through the sizer die when I went to load them a second time results were entirely different. I am sure accuracy could be found but I decided to go back to factory norma brass.
Cabelas is the only place I know where you can get just 50 pieces so wait for a coupon and jump. There is also some factory loaded ammo now available for 30-35 a box which is about the same as buying empty brass
Good luck and remember you bought a weatherby caliber nota 270win so dont be cheap
As for brass I suggest you just spend the money and do it right. I tried resizing seven mag brass but it resulted in more work than I wanted. Necks needreaming and they shot well while using new brass just run through the sizer die when I went to load them a second time results were entirely different. I am sure accuracy could be found but I decided to go back to factory norma brass.
Cabelas is the only place I know where you can get just 50 pieces so wait for a coupon and jump. There is also some factory loaded ammo now available for 30-35 a box which is about the same as buying empty brass
Good luck and remember you bought a weatherby caliber nota 270win so dont be cheap
Originally Posted By: huntnpaI was plannning to buy a min spec reamer and rechamber it to 257 with no free bore and a tight neck.
Also what brass are you guys using? Midway has Norma for $145! That is pretty steep, but if its worth it I'll buy it.
I had a 257Wby build for my nephew and here the spec. Used a Shilen 1/9 twist barrel no Wby freebore and headspace was set on the shoulders not the belt and I had it set up for the 115gr and heavier bullets. You can go back to some reloading manuals that give a warning about backing the loads down with custom throating some say 5% I started at 10% below max load and I used Wby brass. I could get in the mid 3400fps with 115gr bullets using 3/4gr less powder than a Wby chamber rifle and it do in the .3's @ 100yds 3 shot groups and I just cleaned up the necks.
Building a rifle without the Wby freebore has been around a long time was a good article about that in one of Ackley's books. My gunsmith won't do one unless he marks on the barrel not for Wby ammo and he made a good point if something happened to the owner and family sold that rifle.
The 257Wby was the second Wby I had done by the same gunsmith without the Wby freebore first one was a 300Wby and I have a 3rd one in the works be a 270Wby and should be getting that soon using a Rock Creek barrel.
I'm not into rechambering so don't have any experience in having that done. Well good luck
Also what brass are you guys using? Midway has Norma for $145! That is pretty steep, but if its worth it I'll buy it.
I had a 257Wby build for my nephew and here the spec. Used a Shilen 1/9 twist barrel no Wby freebore and headspace was set on the shoulders not the belt and I had it set up for the 115gr and heavier bullets. You can go back to some reloading manuals that give a warning about backing the loads down with custom throating some say 5% I started at 10% below max load and I used Wby brass. I could get in the mid 3400fps with 115gr bullets using 3/4gr less powder than a Wby chamber rifle and it do in the .3's @ 100yds 3 shot groups and I just cleaned up the necks.
Building a rifle without the Wby freebore has been around a long time was a good article about that in one of Ackley's books. My gunsmith won't do one unless he marks on the barrel not for Wby ammo and he made a good point if something happened to the owner and family sold that rifle.
The 257Wby was the second Wby I had done by the same gunsmith without the Wby freebore first one was a 300Wby and I have a 3rd one in the works be a 270Wby and should be getting that soon using a Rock Creek barrel.
I'm not into rechambering so don't have any experience in having that done. Well good luck
bustem19
New member
Does weatherby brass really make a huge difference in weatherby guns?
What about if I have a mark v weatherby and its chambered in a 270 win and I wanted to change that to a 270 weatherby magnum. What would I have to do?
Sorry I'm a rookie at this stuff, but you guys are teaching me a lot.
What about if I have a mark v weatherby and its chambered in a 270 win and I wanted to change that to a 270 weatherby magnum. What would I have to do?
Sorry I'm a rookie at this stuff, but you guys are teaching me a lot.
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