If you neck size your brass only can you do different calibers with the same neck sizer die? Example: 7mm Rem.Mag, 280, 7-30 Waters, 7mm STW, as all of these are 7mm .284 diameter will one neck sizer work for all or do you need one for each? Another would be 6mm, and 243 Win. Two neck sizer dies or would one do both? I know that the brass needs to be fired from the gun you are going to neck size for. I have been full length resizing all my brass for years but with components getting harder to get I think I will try to stretch them out a little farther. I have been to five reloading stores to get Hornady 100gr. 6mm and have not found them yet. Two years ago all these stores would of had them. The brass on the shelfs you could of carried out in your hand. I thought the shortages were about over but now I am not sure.