One of the issues about the current popular rifle weapon is how easy it it is to use and shoot. That seems a factor by these shooters. And while the bullets generally are better at maiming rather than killing, enough of them cause death. Still they are in widespread use so removing them is impractical. Aside from the commonality of the weapon, there is a commonality in the persons where we might be able to do something about.
One of the issues about the current popular rifle weapon is how easy it it is to use and shoot. That seems a factor by these shooters. And while the bullets generally are better at maiming rather than killing, enough of them cause death. Still they are in widespread use so removing them is impractical. Aside from the commonality of the weapon, there is a commonality in the persons where we might be able to do something about.