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daveb
Reply with quote  #1 
I am going to order a custom 6xc reamer and i want a rather tight non turning fit.
I would like to find out the neck dimensions off the loaded round using the different brands of cases.
Neck size off
reformed 22-250 loaded with a 105 lapua ot 107 sierra bullet
Rem Brass
Win Brass
Norma Brass
Nosler Brass
and then also the Tubb brass.
Thanks David
Moderator
Reply with quote  #2 
The only data I can give you is from a dummy round with Tubb 2nd Gen brass: .270 middle of neck with 107 Sierra.

Hope others can chip in.
457ciSBC
Reply with quote  #3 
From memory, if you use the smallest bushing in the Tubb die you can get by with a .271 neck and still have .0025 clearance. I will verify Nosler, Win and 2nd gen Tubb brass tonight to make sure.If you are planning to use Win or Rem brass I would suggest minimizing clearance at the .200 mark at the base of the case. I have some Win 22-250 brass that measures .461-.462 @.200. The reamer print states .4695@.200, Tubb and Nosler brass usually measures around .465 @.200.

Mike
JeffT
Reply with quote  #4 
Nosler = .270"
Winchester = .268"
Norma = .269"
Tubb (3rd Gen.) = .270"


All were non-turned new brass dumby rounds with 107 Sierra
daveb
Reply with quote  #5 
Thanks everybody,
I'll go with a .271 or .272 neck. So i have a tight fit and i can do a very small amount of neckturning. Just removing the high spots.
When i reduce the reamer at the .200 mark will the Tubb dies still size enough? I don't want a tight base and a sticking case at the top stroke off the bolt. But a better fit would be nicer.
Thanks for helping me out.
David
JeffT
Reply with quote  #6 
The Tubb set of dies came with .266, .268 bushings and a gauge bushing that measures .275" to use in measuring headspace. These dies are very nice and work great.
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