I think one of the old gun scribes said there are no bad cartridges, only inaccurate rifles. I’m sure any gunsmith could take premium components and build an outstanding rifle for any cartridge. A few years ago at action I bought a Jap 6.5 sporter. This rifle was outstanding. It even had been rebarreled to 6.5 Jap. Beautiful stock and the finest quality fittings. After market trigger no way to tell make of barrel. I would guess this rifle was built as some kind of sentimental project. Usually if anything 6.5 militaries are punched to take a common brass, but still 6.5 bullets. I come from the era that custom rifles were built on 98s and 03s.