Does any manufacture make a rifle in the .284 anymore, on the shelf?
None of the majors do.
Limited consumer interest equals limited availability of factory made firearms and loaded ammo. Since Winchester/Olin's single 150 grain factory load has the same approximate performance as their comparable 150 grain 308 factory load, few people seem to be motivated to pay a premium price to buy performance that they can get more easily and for less money.
