Hey McGarnagle, here's a few tips from a fellow Norinco owner (I'm on mobile so excuse the quickness of my sentences.)
Ok, so first thing's first, you are definitely going to want the lowest mounts you can find. The slant of that stock is a real pain and doesn't provide a comb high enough for resting your cheek (Hence why I ditched the sh!t plastic and got a wood stock, more on that later.) Cheek welds for me mean the difference between a comfortable rifle and one that's a wobble-matic.
Secondly, free-float that barrel. Take the stock away from it, and use a Dremel or some other tool, with a sanding device of some kind, and deepen the channel. Keep placing the barreled action back into the stock and run a piece of paper through to check for tight spots. Bedding with shims is also a really good idea, I've got brass shims side-by-side of the screw-holes and supporting all key areas. (This all assumes you have the plastic stock model, mind need to break out the sandpaper if its the cheap chinese wood crap.)
Thirdly, give all the moving parts a really good polish, say on a buffing wheel or from just a lot of steel wool and light grades of sandpaper (staying far away from the locking lug and back of the bolt handle.) The bolt's camming action is very tight and takes a bit of effort when brand new, but after some gentle polishing and cleaning + light lubrication, it runs smooth (and also a few hundred or so opening and closings

). When the majority of these are shipped, it comes in a box that has a lot of that mysterious chinese packing oil. Disassembly the whole thing to as far as you're capable and soak it in petrol to degrease the entire thing, then take the parts out, and spray it with water dispersal fluid. Clean them off, continue polishing/refining all the small working surfaces but do NOT take any type of file or stone to the trigger unit unless you know exactly what you're doing. It's a very particular little bugger, a full guide is available at GunrackNZ's guide to improving norinco's.
http://www.gunrack.co.nz/jw-15-trigger-improvement/Fourthly, use any of the following ammo for best results, listed from most to least accurate:
Anything SK (Especially red-box match ammo))
Eley subsonic
Remington Subsonic
CCI Mini Mag
Winchester Super Speed
CCI Stingers
Winchester Powerpoint
Winchester Z's (useless stuff anyway)
I'll get more details later. Happy shootin