Custom die makers?

[Ccrider]

No, after spring back of the brass, a die that is .003 smaller than the fired brass will only yield about .0015 smaller at the shoulder and .0005-.0006 smaller at the .200 line after sizing. The brass near the base is thicker and harder than the brass at the shoulder, so it springs back a lot more and resists sizing down, hence the difference top vs bottom yet with the same .003 smaller die at both places.

Ok. Now I get it. Never would have thought that a die .003 smaller at the base would only render 0005-6. Thanks

 

[gunsandgunsmithing]

Ok. Now I get it. Never would have thought that a die .003 smaller at the base would only render 0005-6. Thanks

In this game, we tend to think .003 is huge, but a human hair is about .004", so you're just not moving it much. Think of bending a piece of metal in a press. You have to go beyond straight and let it relax.

 

[NC/Br Shooter]

I'm still trying to retain all this knowledge that you guys type out . It's amazing