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6BR bushing/ mandrel

I’m pretty close to getting my 6BR and I’m just wondering what size bushing and what diameter mandrel people are running with Lapua brass?
Stuteville precision prefit
.274 neck .135 freebore
.267 - .268 bushing and .241 -242 mandrel works with unturned Lapua brass for me.
Since you are not turning necks and you have a NT chamber - my bad - you can ignore my comment about reamer/chamber neck diameter. Bill's post/suggestion about bushing and mandrels is a good start. I know some that also add a .266 bushing to their collection.
 
with my .272 no turn I am running lapua turned to .0125
redding bushing die w/ .265 bushing and expanded with km .0015 mandrel , mandrels are slightly oversize to account for spring back , cases are annealed every firing
 
with my .272 no turn I am running lapua turned to .0125
redding bushing die w/ .265 bushing and expanded with km .0015 mandrel , mandrels are slightly oversize to account for spring back , cases are annealed every firing
Is that about .002 neck tension?
 

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