You could
1: polish the ball expander
2: lube the inside of the neck
3: go to a mandrel type expander (I'd still lube the insides of the necks, or get a titanium nitride coated mandrel, or carbide mandrel if you don't want to lube the insides of the necks.
have you removed the ball expander and...
Good suggestion on testing the neck tension.
Also as mentioned, get some 175gr SMKs over Varget or IMR 4064. Try switching to Lapua brass if possible too.
What's the twist and length of the barrel?
When was the barrel profiled? Since new or recently? Have you shot factory Ammo through it since the barrel was profiled (lightened)?
LED lights should be fine for digital scales.
If you have a shelf over the bench, grab some led strip lights with 3M adhesive on the back and stick them to the underside of the shelf. Works great on my work area!