"I have five Lee pro powder measures for my four hole Classic Turret and they work great, and I mostly load pistol, hench why i want to use it on my LNL."
I think you're going to get great results and I've loaded on a LnL for a decade and yes, I used Lee Pro Auto Disks for pistol on my LnL AP to eliminate having to adjust my LnL measure for pistol. I actually ended up having a Lee measure for each pistol caliber and used my LnL for all my rifle. Worked out great, never had to adjust the Lee measures and the micrometer I had on the LnL made quick work of setting up for rifle.
"I really like the adj. charge bar also.
It would be so much easier using this measure with the disc's rather then re-calibrating the Hornady measure for each different load."
I found it's easier with the LnL bushings to just swap in a pre-set/pre-labeled Pro Auto disk measure for each pistol powder than other other method I used. As cheap as they are, you can afford to do this easily. Sounds like you have several already. I had four, one for each caliber I loaded a lot and once I adjusted for pistol calibers I only occasionally loaded for.
"I will be using the riser with the powder thru expander die as I do on the turret. I will keep a Pro measure dedicated to the LNL along with my Hornady measure."
If you already have them bought, I think you should devote one to be pre-set for each pistol caliber you load for.
"The Lee pro measures are the best i have ever used for charging pistol cases, when operated with the springs, and will free up another die hole in the press."
They are as good as any for loading most pistol powders and you can't beat the price for them with the dies and the through hole powder drop. They can spoil you.
"I think it will work great, will keep you informed.
Thanks for the input."
I know they will work great and you will be glad you used them. Not sure if you need the riser or not. I'd try it both ways. I don't think I used it and sold off my risers instead, but I'm not sure without getting them out of the box. They're packed right now while I'm in the process of changing/upgrading my press.