Here is my prediction: In 30 years, most of the cartridges introduced in the last decade will have disappeared. Hardly any of them do anything not already covered by more established rounds.
I would bet money on the .300 Blackout, 6.8SPC, and 6.5 Grendel being collectors items 30 years from now. Ditto to most of the new proprietary hunting rifle cartridges. The WSSM's, Ruger Compact magnums, and Remington SAUM's have already all but disappeared, I am betting the WSM's (with exception of the .300) and Rem Ultra Mags will follow suit.
The .357 Sig and .45 Gap were never widely accepted, and are currently only available due to pressure from two major manufacturers. I think the .40 S&W is starting to fall out of favor, and in 30 years will be about the same status as the .32 ACP is now.
By all accounts, the 16 gauge shotgun should have been extinct 30 years ago, but it has a small but fiercely loyal following that might keep it alive for a few more decades. The 10 gauge is getting less popular every year, and if a less expensive non toxic alternative to tungsten and bismuth shot shows up on the market it will probably go the way of the dinosaur. The 12, 20, 28, and .410 will continue to soldier on, primarily due to target shooters.
I would bet money on the .300 Blackout, 6.8SPC, and 6.5 Grendel being collectors items 30 years from now. Ditto to most of the new proprietary hunting rifle cartridges. The WSSM's, Ruger Compact magnums, and Remington SAUM's have already all but disappeared, I am betting the WSM's (with exception of the .300) and Rem Ultra Mags will follow suit.
The .357 Sig and .45 Gap were never widely accepted, and are currently only available due to pressure from two major manufacturers. I think the .40 S&W is starting to fall out of favor, and in 30 years will be about the same status as the .32 ACP is now.
By all accounts, the 16 gauge shotgun should have been extinct 30 years ago, but it has a small but fiercely loyal following that might keep it alive for a few more decades. The 10 gauge is getting less popular every year, and if a less expensive non toxic alternative to tungsten and bismuth shot shows up on the market it will probably go the way of the dinosaur. The 12, 20, 28, and .410 will continue to soldier on, primarily due to target shooters.