.257 STW
To make .257 STW out of 7mm STW, is it as simple as running the 7mm through the .257 sizer? Please provide any suggestions for forming brass.
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JSJ Gunshop,
You probably can get away with smashing it down in one move but I use two. It's not as hard on the brass and seems to keep the operation running smoothly. Use a good lube and take your time. Polish your expander ball and use a tiny bit of lube on it for the first resize at .257", then check your neck thickness at 4 places. You might benefit from a touch up neck turn. Trim and chamfer.
Best.0 -
Nononsense,
Thanks for the response. I think I could use my 6.5 Rem mag sizer to do the first neck reduction, followed by a pass through the .257 STW full length sizer. When you say "neck turn" are you referring to the inside our outside? And would you do this after the reduction to .264 or upon reaching .257?0 -
JSJ Gunshop,
Sorry. I normally refer to outside as neck turning and inside as neck reaming since I use two different tools to achieve each process.
This is a brief discussion:
http://accurateshooter.wordpress.com/2009/01/31/tool-tip-optimize-your-cutter-angle-for-improved-neck-turning/
I do use a neck reamer on the inside of the neck to remove those sometimes devious 'doughnuts' that occur occasionally:
Using the 6.5 Rem. Mag. should work fine then just go down to the .257 diameter. I reduce all of the cases one size first and the final size second. Then I can concentrate on the finish list:
- Full length resize with a polished expander ball and lube.
- Trim to length.
- Chamfer mouth of case.
- Measure the neck wall thickness.
- Neck turn if required.
- Section one case to see of there is any thickening at the shoulder/neck junction. Ream if necessary.
- Check the inside of the neck/shoulder junction for the doughnut after the first firing.
Best.0
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