I would worry about heating up the barrel. My Yugo gets pretty hot using the factory fixed mag and stripper clips. I can imagine the results after burning through a drum mag.
To be clear, I've never used a drum mag for an SK, but I have used lots of other aftermarket magazines with very poor results. The only mags I found that would function correctly were the Tapco 20rd detachables. All the rest had frequent failure to feed and eject problems. After trying just about every option out there, I returned it to its factory furniture.