The HSc was designed around the .32 ACP and in that caliber it was reliable, however when Mauser up it to 380 it picked up a reputation of being very finicky, I don't imagine going to a high cap magazine ( Gamba )made it any better. I'm not a engineer and I don't don't know why this is so, but the number of complaints about the feeding habits of this gun far exceed those who are satisfied with it. I had one of the original Mauser HSc's in .380, it was not a gun I felt bad about parting with.