Wow, thanks for all the input. We test our pistols here with Magtech, so I don't think it is the ammo. There are a few things it could be, Do you have the recoil spring on correctly, you mentioned a raspy sound? If the spring is on tight end first, then it could be a few other things. First, have someone else that is a good shooter try shooting it, if it still is a problem then I would send it in.
If you check the top of the Tech Forum, it has shipping directions for returning your pistol. Please let us know what you find, and what we can do to help.
Thanks,
C. Royce Honeycutt
Master Gunsmith
Master Firearms Instructor
Bersa Warranty Center