Thanks for that information John. It's tough to collect enough data points unless you're in your line of work. Were the receivers from those 30% usable? I have two deluxe rifle receivers, and the finish quality on both is well above average. One of them has a badly over indexed barrel, though, and I would sure not shoot it stock. Incredible that they're still turning out rifles like this.
If I'm not mistaken, most of those "Italian walnut" stocked rifles were 2013 marked M305's. At least that is true of the ones I've seen.....
All told, in my experience with Chinese M14's, I've only seen 5 or 6 recievers that were so out of spec that they were garbage. About 25% of the ones I see have "little issues" but are still safe for use. The rest all spec out very well, pretty darn good IMHO.
Despite all the finishing marks and shoddy machining the base forging is pretty darn good. Where the Chinese seem to really muck-up is when it comes time to finish a reciever before heat treating. They seem to use milling bits well past their due date. Their heattreating is also suspect, although I really can't justify that statement with hard data, I suspect that their heat treating processes are "on-par" with their machining QC. Not that Ive ever had a problem with a Chinese reciever being too hard or too soft....
This is where a receiver like a LRB really shines, it's made from a forging, you can trust that the milling was done properly, that the heat treating is done perfectly. The only down side is the price.
OTOH, if a fella was willing, the Chinese reciever can be annealed, cleaned up, healstamped, heatreated correctly and reparkerized for around $500 on top of the price of a base rifle.
In reality, there isn't a lot of price differance between a LRB M14SA and a "polished" Nork.... but that's a whole other topic!
John