After studying my aim for a while, I realized that my headshot accuracy is complete garbage. I've tried pre-aiming for the head and lining up with boxes, but it somehow in the end still hits the body. So is me forcing myself to go for heads...

Me and my friend were thinking about this. You can consent to your friend or party member joining the range with you. This is mostly because of custom matches being limited fo the agents you already unlocked so either this or that