Need Info and advise on 20BR Switch Barrel

[voldoc02]

Hope you-all will give me some info regarding neck diameter etc. turn or no turn .. what is yours.. I'l be using mine for PD fields so I'll be making several hundred cases.
From my post regarding 20BR:
Well I'm new to this forum but been on GGVG
for a long time.. I'm building a 20BR switch barrel for my
Savage Dual port== have a new Hart HV 9 twist 20 cal
finish @ 27" barrel ordered and wait will be about 4-5 weeks.. My Savage has
been T & T by SSS and has the evolution trigger.. sweet about 3 ozs.

Talked to Todd Kindler yesterday, He has Kick-A$$ knowledge..
He said I should have a reamer with .235 neck for the 20BR.
He said that would only require a little neck turn clean up after necked down from the parent 6BR case.. I'm hoping you guys will give me some good
info and things to avoid as I've got 22BR and 22 Dasher but never gone
to 20 cal before except for 204 Ruger Cooper.. it was a lazer..
don't know why I sold it?? please give me your ideas as to neck diameter and no turn vs. turn etc
thanks in advance
Doc Stone

 

[txdan]

Just getting my 20BR up and running now. I did get lengthning of Lapua cases to about 1.565" after neck down. Neck diameter with Berger and NBT 40s was .233. Just read a reply from Kevin Thomas (Lapua USA) that the neck wall thickness was changed from about .013" to closer to .012" for the 6BR.