I shot about 50% of the rounds today w/o a stove pipe jam. The jams were a problem when my 125 lb wife shot- possibly a "limp wrist" grip. Jamming was more common early in the session than late; she may have become more comfortable shooting as the session progressed and had a tighter grip. Today was her first time to shoot a pistol.

I found this entry under stove pipe jams-

Limp wristing - Wikipedia, the free encyclopedia