Re: ? on dies
Loading with no runout takes a lot more than dies, it also requires perfect case necks, every time, and that ain't gonna happen in this lifetime.
All manufactored products have tolerances and, if the tolerances stack right, any common seater die can work as well as the most costly ... but that's not common. The better designed seaters have features that insure while they may not be perfect all the time they will never be very 'bad'.
The Forster and Redding comp seaters are truly 'straight line'. They both have spring-loaded, full length body sleeves that align the case and body before seating begins so they're as good as it gets for threaded dies and presses.
RCBS' costly seater sleeves are short and loosely fitted so they can fall with gravity; at best, they can ONLY align a bullet to the case mouth, not the body. The side loading window device requires the shell holder to be mounted on an extender and the extender itself is another potential for case-to-bullet misalignment. It's obvious that some people love the bullet side loading feature but I know of no serious competitive marksmen using that die.
A micrometer seater head does nothing for the ammo, it's simply a user convenience for making OAL changes.
Many of us have learned to love Lee's Collet Neck die because it insures the straightest possible necks no matter the thickness of the case necks and we don't have to fuss around with bushings for a factory chamber. Combine that neck die with anyone's body die and we can do 'full length sizing' with good necks.
