Lube the body to avoid stuck cases, inside neck so the neck expander doesn't drag on the way out.

Also be prepared to deal with crimped primer pockets. Lots of 5.56 brass available but most of it has crimped pockets.
They can be removed with various tools (and most commercial reloads have been done this way) but the best way
is to swage them - making the pocket stronger instead of weaker.
Best swager is probably the Dillon @ north of $100 while the most common way to remove the crimp
is with a $10 (eBay) case mouth chamfer/deburring tool.
deburring tool.jpg