Oh man, it runs like butter even with the cheap stuff.
It does not like the pro mag much and despite my urging to get the MD-20, a pro mag was ordered to save money.
I will be ordering a MD-20 and as many stick mags that funds will allow then I can use the pro mag for a paper weight.
I'm not big on drum mags anyways.....never had good luck with them on any rifle.
I still need to spend some time dialing it in.