I just sold one, very nice unit. Every gun is different as to which ammo works best for that weapon. That said mine liked S&B ammo the best, do not use subsonic in your SD and try to find as clean burning ammo as you can because they do get fouled up much faster.
Keep it clean after each outing and you sould have no worries. Just try different types of ammo until you find one that feeds/runs 100% and don't foul things up so quickly. Might want to take along some bore blast spray to use while trying out different types of ammo and give it a good spray in between ammo changes. Also try not to over lube it as it would just get messy inside after a few mags.
I would run about 240rnds of whatever is working to see if any feeding or fouling problems creep up with no cleaning. If it runs fine after about 6 mags or so that ammo should be good to go. But you will know what works and what won't soon enough on an SD. Again the biggest thing about an SD is no subsonic and keeping her clean. HP & FMJ stuff should all work fine with the right ammo combo and curved mags.
Have fun they are a cool deal! A bit more picky but worth the cleaning effort.