I just picked up a CZ 40 B and was wondering if anyone has experience with this firearm. Good bad or ugly. The gun I picked up is almost new with about 50 rounds run threw it. I went out and picked up some Winchester 140 G FMJ. The gun has jamed twice in the first 50 rounds with the Winchester amo. I also picked up some Remington 180 G JHP and have not had a failure with this amo. Do I need to be looking for problems with this gun or just use the amo the gun likes?