Comments on: Reloading Tip: Use Expander Mandrels with New Brass

By: jeremy

jeremy — Tue, 30 Oct 2018 05:35:02 +0000

I was having trouble after full-length re-sizing new brass with accuracy for the first shoot.
Now my shots are accurate when I use the mandrel after re-sizing. Then I use the Lee neck sizer and it is perfect.

By: spclark

spclark — Sat, 21 Apr 2018 15:09:30 +0000

Yep, been doing this now for years with new brass (only step besides flash hole de-burring) before brief corn-media cleaning then prime & load. Same for last sizing step w/ fired cases after bushing sets neck diameter to 0.001″ smaller than I prefer for loaded rounds.

By: Butch Lambert

Butch Lambert — Sun, 15 Apr 2018 22:38:47 +0000

Understand.

By: Butch Lambert

Butch Lambert — Sun, 15 Apr 2018 15:48:36 +0000

I don’t use bullets to form my brass. I use Bullseye and a wax plug. That leaves only a very very small amount to expand and the necks are about .005 longer as they don’t shorten as they do when expanding with an expander. Just my way.

Editor: Butch, thanks for your tip. In this case we are not talking about going up from a smaller diameter (say e.g. 22 to 6mm). We are only talking about running the same caliber mandrel — a 6.5 mm in a .260 Remington for example. When doing that the shortening is minimal.