"...Carbide dies only work with..." Carbide works just fine with a bottle necked case. Dillon has made 'em for years. However, they're really friggin' expensive. Their .300 BO 3 die sets run $189.95. $165.99 for just a sizer and are currently heavily back ordered according to their site.
Making a carbide die for a bottle necked case costs more due to the nature of tungsten carbide. Extremely brittle stuff. Has to be machined using ECD machining.