They both shot around three times a week so know how to handle guns. Son was somewhat maybe unknowledgeable about the SA he was useing.I have seen times with Sa that the second shot was not fired and at the next post two more shells put in the gun but always caught apond chambering.All guns are OK it was human part that errored or as stated maybe not.I'm sure most here drive so safety is not the real reason to not be around groups with guns because of what might happen compared to driveing.Hopefully an update will come with facts