Bug, I think: Shoot a snare dart thingy and when it gets near a ragdoll hold left click on the snare dart. (might not work i dunno i've done it only 5 times)
You should work a tad more on the shooting physics, they are coming along PERFECTLY, it's just the fact that a bullet from a high powered sniper rifle shouldn't just knock the doll out for a while. + this so 0rava can see!
I usually check my previous replies list if the same question gets asked a ton.