Re: Tooling Marks on Necks From FL Die? Problem?
" ..the neck is no longer as smooth as the body, ... is this common? I am pretty new to reloading. Thanks."
It's common, if not normal. And it's unlikely to be from machining. It is most commonly a result of microscopic bits of "galled" case brass that has adhered to the die's neck wall, or the body for that matter. The bits will accumulate with more use. Eventually, the case scratches can cut deeply enough to make necks fail early but that's sorta rare and not dangerous anyway.
Rubbing any dry metals against each other hard pressure without lube can cause the softer to attach itself to the harder as firmly as if wielded. After galling occurs we can remove it with a simple home made lap but that can be tricky unless you are mechanically inclined. If you aren't comfortable fixing it yourself either live with the scratches or send it to the maker for lapping. Best thing is to prevent it.
A LOT of folks say not to lube necks at all to prevent lube dents on the shoulders during FL sizing. That works, but it also opens up the potential for galling! I prefer to apply a very tiny amount of lube on the necks. There is no need to load them up with any oily stuff, just a trace is sufficent.