Bushing?

[750k2]

I've been doing some searching and it seems alot use .268ish bushings in 6mm.
My lapua is .0155 thick so comes to .031 + .243 is .274
I've been using a .271 and my rifle shoots in the .2's,Holland/Krieger 700 .243)
My math shows .002 hold after .001 spring back.
Why so many posts stating a .271 wont hold the bullet?
Am I missing something? I have a .270 also and will testing a batch next trip.
Been running 65gr Berger BT w/41.0 Varget BR2 @ 3550
I shoot as a single shot so not worried about bullet movement in the mag.

???

 

[shootsanything]

First thing is, if it is working for you in your gun, who cares what other people posting say.

From reading your post I will assume you have a no turn neck chamber. With that piece of data I say you are doing everything right. You may find different batches of brass that have a thinner/thicker neck and this will alter your results. I do exactly what you do - size my brass ~0.002/0.003 less than the loaded diameter. This gives me good brass life and reliable neck tension which is what I think we all want to achieve.

A lot of the 6BR brass is .012/.013 with no turn and this is why you see a lot of people using .268/.269 bushings. I seem to recall that my Lapua 243 brass was thicker - .015/.016 but since I have a .270 chamber all my brass was turned to .012 and I have been using a .266 bushing and have had groups under .2 at 200 yards.