If you shot a buffalo, in the lungs, and got into its "face", don't you think that also would provoke a charge? I don't think a gutshot is necessary.

The usual practice is to shoot the buff and if it runs off, give it some time to stop and lie up. Someone once questioned why is this acceptable strategy any more or less ethical, than an immediate follow-up where the buff is perhaps more alert.

Also approaching the buff from its head and perhaps with the wind behind you may also create a charge.

Remember most of us do not want a charge so do it differently.

A reason why films show buffalo in the open charging may be because these bulls have the acceptable footage for commercial sales.

Just some ideas.