Here's a little tip that, believe it or not, can help make dry firing a handgun more productive and enjoyable. Learned this trick in the service w/1911's but see no reason it would not work w/just about any SA pistol.
Sharpen a new wooden pencil(eraser must be square, as in unused). Draw a small target and hang on a wall. Position yourself close enough to the target to allow pencil to move forward a half inch or so in the barrel and "dry fire" for a group. Firing pin drives pencil w/sufficient force to imprint on your target.
Have fun.
Regards,
hm