I used to use homemade dummy rounds identical to my normal shooting ammo, but without powder or primers. Until one day, doing dry fire and mag changes and clearance drills in my living room, I found a live round on the floor with the homemade dummies I'd just ejected. I've got cats that love to get into stuff, so it's not uncommon for them to use ammo as play toy, and as such, they can be anywhere in my house. From that day on I only use one of two snap caps, the solid plastic bright orange ones, or the chrome ones with bright orange plastic tips. I will never ever use my own dummy rounds again, and can't recommend anyone else use their own either. Unless they have made them impossible to confuse with a live round. Pretty much everyone I know who shoots has a cup in the laundry room filled with random live rounds. Far too easy for those to get knocked on the floor, kicked across the house and end up under a table where that homemade round you just ejected ends up too.
...and to think today you just have fangs
Rob Engh
BC, Canada
Sorry to pick up an old thread, but I hadn't seen this said otherwise. Dropping the slide on an empty chamber will damage the sear of a 1911; I am not aware of it doing harm to other designs. This isn't due to soft metal, but rather the design of the pistol. Y'all can think that's a design flaw if you like; more for the rest of us.
I've done an awful lot of dryfire reloads with Glocks and none of them were the worse for wear. I use the CRTC Safety Mags and no snap caps.