Mosin nagant 7.62x54r

[Ro-bert]

Can one control the amount of sizing in order to compensate for varying case neck thickness?

Inner diameter is (when properly set) is always equal to mandrel diameter (when collet closes - it presses neck material to mandrel). Pressure can You adjust with some (1/4) turn of complete die more or less into the press.
The good with the collet - you don't have to lubricate your cases.


EDIT:
To illustrate (ignore mark - left over from the one other debate)

and some comparison: