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Neck diameter/throat length ??

I'm trying to determine what reamer specs I need to look for a new barrel in 6mmBR (plain).

I will be using newly manufactured Lapua cases and Berger 105-107-108gr bullets. What would the loaded neck diameter be? I think I want to get a reamer that provides for .003" in total neck clearance. What throat length should I be looking for?
 
I'm trying to determine what reamer specs I need to look for a new barrel in 6mmBR (plain).

I will be using newly manufactured Lapua cases and Berger 105-107-108gr bullets. What would the loaded neck diameter be? I think I want to get a reamer that provides for .003" in total neck clearance. What throat length should I be looking for?
With Lapua brass mine normally run .269 to .2695 with the Berger bullets.
 
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I have the "standard" Manson reamer. It has a .272 neck and .105 freebore. Works great for all the Berger bullets in the 105 class. My gunsmith said it cut like butter. Both Manson and JGS were very helpful and I'd recommend you contact both of them. I went with Manson because they had one ready to ship.

Edit to say to get a “go” gauge w/ your reamer.
 
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