Thanks for the input guys. I have never used a bushing die and I am still trying to wrap my head around the concept. It obviously allows you to adjust neck tension. The way I understood the mechanics of a neck sizer before was that the expander button went down through the ncek, and the the neck die squeezed the neck the a slight less diameter than the expander button which would open it up to the correct "inside" diameter to seat the bullet. With the bushing style sizer it seems that the expander button plays no role?
Measuring my Rem factory ammo, the neck OD measures ~ .3375. I plan on turning the necks just enough to remove the high spots. Right now their thickness measures ~ .017-.018, so hopefully I wont be removing more than .001 of material.
When I measure my 300 WSM
before seating and after seating 180 E-Tips. It measures .336 before and .338 after, so .002 tension? This seems to work very well with these bullets as far as grip. They seat smoothly and hold well.
Soooo... I'm guessing I need a .335 bushing??? Any comments?