Now I am proud owner of a C-Mag!!!!! (Don't ask for the price! Its extremly hard, nearly impossible to get this mag outside the USA...and the guys how sell it know this!!!! here
Maybe a stupid question, but MGI for example, mention in the manual of their 90-Rounder-Mag, that you should only use the provided magloader to avoid damage on the feedlips.

Is there any problem of using a LULA on the C-Mag?

Do not drop it....

remember to add graphite about every other loading.
I have used mine about 9 times now, no issues.

ETA: I understand that the lula gets stuck on the tower becuase the tower is too thick. I don't know, I don't own a lula. If you got the 5 round "personal loader"  order up the 10 round loader, you can use strippers with that. (or any other mag)

Lula get stuck because of the release on the Lula. A lil grinding on the edge of the Lula will fix it for U. O I love my Beta's , I can not wait for the Ar10 version.

Quoted: Lula get stuck because of the release on the Lula. A lil grinding on the edge of the Lula will fix it for U.

+1  don't slam that LULA home the first time.  The release for the LULA is so close to the mag body that it will jam and be difficult to release.  Slide it on part way and you will see where the release latch will touch the mag body.  Just trim, grind, or file that edge and you should be good to go.