Both Remington and then Winchester lost the very lucrative military contract to produce ammunition at our American Lake City Army Ammunition Plant. After this the quality of both went down hill, and Winchester sold off its brass manufacturing facilities and both Remington and Winchester sold off their powder manufacturing to General Dynamics Weapons Division. If you Google Winchester-Olin you will see that Olin chemical is only making fertilizer now.
With the economy they way it was and still is and the greedy share holders wanting their cut, quality had to suffer in the name of company profits.
Not to be a smart ass, but I have "older" Remington and Winchester 30-30 cases that are 25 to 30 years old and only a few die with split necks. Meaning they are not made like they use to be and factory rated max pressure is approximately 38,000 cup or 42,000 psi.
The case photo you posted split because the brass was too hard and thin to withstand the low pressure of the 30-30 cartridge, meaning bad quality control and buying brass from the cheapest suppler.