Hello,
You need to cast the type of OutHit.GetActor() to your custom type.
AHandGrabVolume* HandGrabActor = Cast<AHandGrabVolume>(OutHit.GetActor());
// Always check casts to make sure they are valid.
// Casts return NULL if the cast failed.
if (HandGrabActor != NULL)
{
FVector HandGrabLocation = HandGrabActor->GetHandGrabLocation();
}
~ Dennis