I tried some 185gr rds thru my G30sf (Gen3) and don't remember any problems (or if they had flat or round nose). About the only problem I've had was one jam with a reload (professional, not my own) that I had a bit of trouble clearing.
When the gun was new (2-3 years ago) I got a mis-fire stuck in the chamber
that freaked me out. Don't really know why that happened and I CAREFULLY
got it out with a wooden dowel and a lot of sweat! My G30sf has been the most problematic of 4 Glocks that I own/ed.