I thought only one guy fired as like you, I only heard one shot.

Will go and have another look.

Well, in looking at it, they both seemed to reload one round
and it could be that they both fired at exactly the same time ???????

I notice one of them says "reload" but don't know what protocols PH's use. I know in some situtations I say "reloading" even if the other person hasn't fired to let them know in case another animal jumps up - ie Pig, Buff etc.