Lee Collet Die Method -- Rotate Case?

[Tesoro]

Bryan Zolnikov did a test with his short range BR gun, with much the same result.

same result showing what?

 

[Coyotefurharvester]

My smith, told me, cut the chamber concentric with the bore. All ammo will be straight when chambered.

 

[WSnyder]

same result showing what?

Bullet runout

F-Class John’s take:

 

[Mark611]

My only comment is these guys are shooting rifles that have custom chambers that will inherently straighten some of the runout issues, they made that clear, my info is for the person shooting a SAMMI spec chamber, where the tolerances are much bigger, and are not going to be as forgiving as a custom reamed chamber,

 

[Tesoro]

Right! What bullet form? What chamber neck diameter? Tight chamber? What jump? What kind of lead? How long a throat?
Common sense that in some instances normal runout is not an issue as bullet/neck will be straightened when loaded, or it just isn't an issue. and in others cases not necessarily so.
Easy to test this for your particular load if curious.
I do believe that the top precision shooters will say straight ammo shoots tighter that crooked ammo!
Straight ammo is very hard to make consistently with multi fired cases. That I do know!