Good day, folks,
I can add a perspective on Norinco rimfire from some variants you may not be familiar with. I have no hesitation in saying that Norinco has, or at least had, some pretty high end rimfire stuff in addition to the entry level models.
For example, on the more modest, but good quality, end, there is an NS-522 variant that can be viewed here:
http://hammer.prohosting.com/~primec/index.htm
The page is old, but has excellent information and photos. This variant is a five shot semi. The website also has comparison photos of a very good quality "running boar" variant (EM-763).
As for me, I had the good fortune to recently acquire a single shot target version, the EM-752, that has essentially the same receiver/bolt as the EM-763, but a different, longer variation of the heavy bull barrel (690 mm/ 27 in), recessed target crown, two-stage adjustable trigger (80-300 g).
Other than the serial, every other marking (including on the aperture rear sight knobs - learned the Chinese characters for up and right !) is Chinese, and the only reason I know for sure it is Norinco is the North China Industries "mountain" logo, and the poorly translated photocopy "brochure".
What I can say is that the EM-752 appears to have very high quality components (barrel made in China on Austrian Steyr machinery), fit and, for the main, finish. As someone still relatively new to the discipline, I fire 98's and 99's prone 20 yards at the DCRA pinprick bullseye target, using Lapua Master M, and the only thing between me and a possible is, well, me. This rifle is dead nuts when I break the shot correctly.
I can try some pics if there is any interest. Norinco, i believe, also still makes the olympic hardware for china's smallbore shooters too, so I wouldn't base many conclusions on the jw-15.
That said, i realize what i have may be a rare find. Anyone know of whether there are more of these around ? This one originated, I believe, as an import by Range Sports Unlimited in Kamloops, late 80's. Cheers.