I think you didn't quite understand what I meant. Pakistan DID adopt the 7,62NATO caliber even tho it wasn't specifically made for this environment. That means other calibers can too, potentially. So why go thru the whole process of developing a new caliber if there can be something in the market that can potentially fulfill our needs.
and how did that work out? And I don't think most people have a problem with selecting Chinese systems. It's selecting ONLY Chinese systems, be it the JF-17 and it's avionics, be it most of our tanks, be it most new Naval acquisitions from the new subs to the VLS on the Jinnah-class. Too much dependency on one source, be it the Chinese, doesn't always work out as planned, and what better example for that than our own air force following the 1965 war.