RE: 375-Ruger
Can you say "MARKETING". When you bring out a new product, IMO it should be some sort of improvement. The WSM group of cartridges would be an example of an improvement. For Ruger to put out a new cartridge like this, and their new rifle is strictly marketing. The rifle should have a good trigger. IMO a good trigger is not an improvement, it should already be there. Especially for $900. There is no Wheel Re-Invention here, strictly marketing.
Vanity is not a good reason to bring out a new cartridge. I just imagine that Ruger wants their name on a few cartridges. Maybe they want to be like Remington or Winchester. Tom.