ETS Loader arrived today. It helps to lube the channels with your favorite oil (Hoppes 9 aerosol for me). It works for both my 5.56 Green tip as well as my .308Win in my PMAG-30's/10s respectively. When you are just starting, be sure to get .308 rounds into the little channel to make them stand upright in the loader. The 5.56 should be flush inside and not in the channel. See below.
If you look up top, you'll see two channels on the rail. The outer channel (more visible), it where you insert the .308 rounds via the rim. The inner channel (below the outer one and flush to the stick) is for 5.56/.223. Make sure you get them flush if they are 5.56/.223. If done correctly, you should be able to turn the unit upside down (i.e. bullets facing down) and not have them fall out. Soon, you will be able to pick up 10 rounds if they are packed individually in a case.Just slide it through and then turn it right side up like this....
Works like a charm! It holds up to 15 rounds comfortably, so I'd have to do two loads for a PMAG-30 but my PMAG-10's work in one!
Thanks
@BeerHunter