You will find many guns have that rattle, I hate it. My Glock 22 40 cal does this when loaded full. My Glock 26 did this also. This is not just prone to Taurus guns. If I load the Glock 22 mag with 15 and rack a round it won't rattle, but as soon as I top off the 15 round again it rattles. I carry one less round because of this.