I did some research on reloading 5.7 x 28 and it looks like they are reloading them without any major problem. There were a few old post about the bulge but now it seems that if you take your time they'll do OK. I guess it all depends on how bad a particular firearm deforms the case and reloading life. Maybe someone that reloads them will chime in on this. One thing I read was not to tumble the brass since it has a special polymer coating for extraction and magazine feed.
USAF Retired, CATM, SC CWP, NH NR CWP, NRA Benefactor
To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them... -- Richard Henry Lee, 1787