How does the Lee collet Die work?
A collet squeezes the case neck against a precision mandrel for a perfect fit with minimum run-out. No case lube is needed. Cases last ten times longer, so the savings on only 35 cases will pay for the dies. Maximum accuracy is usually achieved by seating the bullet out far enough to touch or almost touch the rifling.
What does full length sizing do?
The full-length sizing die performs multiple important functions: it resizes the case body, resizes the neck, and adjusts the headspace relative to the chamber (it can also eject the spent primer if that was not done previously).
What does a sizing die do?
A resizing die is simply a carefully-shaped hunk of metal that is used to “press” the empty cartridge case back to standardized dimensions. With fired brass, you take a cartridge case that has contained a massive conflagration, and therefore expanded in size, and press it back into shape.
Should you full length size new brass?
Full length sizing won’t do anything to the case, since the case is the smallest it ever will be. Re-sizing brass that’s been fired will not get it to unfired dimensions, just to “acceptable” dimensions.
What is a Lee Collet die Set for?
This die sizes only the neck to preserve the perfect fit of fire forming. A collet squeezes the case neck against a precision mandrel for a perfect bullet fit with minimum run-out. No case lube is needed. Cases last about 10 times longer. Only reload cases that have been fired in you firearm.
Does new brass need to be trimmed?
Some calibers are worse about this than others, the intensity of the load as well as the way in which it was resized, and a host of other factors come into this as well. But new brass, right out of the box, should never need to be trimmed or sized.
Do you need to size new Hornady brass?
Generally most all new brass needs run through the sizing die and chamfered before loading, and trimming is an extra good idea if you want consistency.