Originally Posted by 10point
What is the value of necking down a case? Is the necked down version a stronger case that allows greater pressure without greater danger?
Their may be a small amount of neck thickening .0005 to .001 but not enough to cause problems
just the same you need to mic. the necks before and after to make sure that they will still fit in the chamber loaded and with at least .003 clearance when loaded.
If you size the 300 WSM brass use your 270 dies. you will also see a small donut at the base of
neck about .022 from the shoulder. (This is corectly sized and will fire form fine).
I personaly prefer using a larger case and sizing down than sizing up a smaller case.
J E CUSTOM