i have heard that it does and can cause stress fractures to the pin. don't hold me to that, as i am not a gunsmith. just what i have been told. there are such products as zoom caps, and snapp caps to name a few. these are inert cartriges that you can get in any caliberand can use when practiceing trigger control/squeeze and breathing techniques. www.cheaperthandirt.com and www.sportsmansguide.com sells them. kyle