Here is a great write up on squib loads by Frank. If you have any questions regarding this please see Frank when your at the range. He will be more then happy to chat with you.
There is something we need to discuss as these pictures tell a 1000 words.
Luckily no one was injured with this operator error. This was an unfortunate squib round where the primer exploded with no powder ignition. Bullet was sent to the end of the muzzle but the owner did not recognize the lack of recoil or the lack of noise. He then proceeded to follow the squib with at least 3 more follow up shots and caused significant un repairable damage to this Colt revolver.
As shooters whether new or seasoned we need to be aware of what our firearms are doing as well as where we are placing our shots. Learn to recognize your firearms reactions or the lack of. Especially if you re load. Most squib loads occur with re loaded ammo but it still happens with factory also. Be careful out there folks. The loss of a firearm is replaceable, an injury heals but a lost life is gone forever.