lube to size edge brass

[danj]

What lube do I need for the necks before I run the expander for the 300 rum brass to open it up for my 338 edge? Just got the rifle so I haven't resized any new brass yet. Thanks!!

 

[geargrinder]

I use imperial sizing wax lightly applied with a q-tip into the neck.

 

[jeffro]

I use Hornady Unique. With a neck brush. Works good for me.