I resize many necks with this method. sometimes I get better results than full resizing. Sometimes full resizing is better. It depends on the rifle and the load!!!
When you use this method. It usually only works on the Rifle you are shooting with. although it might work with many if you are shooting Mosins. they are pretty tolerant.
FL size when your done with the rifle to return the brass to factory specs.
![](https://i.ytimg.com/vi/ivelrfkiaQY/maxresdefault.jpg)