So I have this preference of also lubing all cases on the inside of the neck when I do some resizing. Just one snag, I cant use just any kind of lube or wax unless I risk contaminating the powder. So from what I understand is that no oil based lubes or waxes are powder friendly but lubes like Lee case lube are fine (been using Lee on several hundred cases).

But my question is, what products are available out there which additionally to Lee's product are safe for my kind of inside lubing practise?

All the spray lubes I have used (Hornady and Midway) direct you to spray some lube inside the case neck to lubricate inside the neck.
Been using the sprays since Hornady came out with theirs (10 years? 12?), and I haven't had any contaminated powder yet.

Graphite or Motor Mica...both are powders, but apply pretty easily. Just put a 1/3" layer in a can top, and dip the case necks into the powder, and size them. Doesn't take the place of resizing lubricant, but does ease the passage of the expander ball through the case neck.

While using a very minute dab of Imperial Sizing Wax on the body of a case, will rub the ball of my forefinger across the case mouth. This places just a very little smidgin of the "wax" on the inside of the mouth bevel. This is enough to lube the expander ball, yet not contaminate the inside of the case and powder.

Kdub,
Since the expander ball (rifle, bottle neck) doesn't start doing its job till it's on the way out, how does lubing the case mouth help its passage?
Love that Imperial, by the way.
Pepe Ray

It actually does pick up some on the way in. Try it and see!

That is very true, the expander ball picks up some lube on the way in and when it slides very thightly on the way out some lube might set on the inner low edge of the case neck so it is very important to use a safe lube for the powder in case you dont get it all out when you wipe out the lube.

But I like to thank you guys for the advices, and after some research I have purchased RCBS water based lube and also Hornady One Shot spray to test, which both manufactures claim to be powder and primer friendly.

Rifle243...
In that you already use the Lee Lube have you ever tried mixing it with isopropyl alcohol? Mix one tube of the lube with one bottle of iso. alcohol. Shake and use a spray atomizer to apply. I've tried all the mentioned products but like this best. One tube of lube will lube thousands of cases.

Thank you Ranch Dog-- I gave that a try last night, and I am a solid convert- A little bit will do it- I got carried away, so had to patch out my die every 20 or so-Next time I won't hit it quite as hard. (Converting 30-30 to 25-35 as a step to 219 zipper, utilizing fired annealed 30-30 brass, a Lee 25-35 die, a lee aluminum o-press (challenger) set up on a home made portable stand- Sized them all in one pull, would start to get a little shoulder wrinkle in 18-20 cases, just a quick stop, pull the decapper, run a couple clean patches through, back to the grind.) Next set, I'm going to trim some 30-30 to zipper length, and try it through the zipper die with the lee-alcohol mist.