Re: Why not a lot of chatter about 30-378?
The 30-378 has a couple things going against it. First, in factory rifles, there is a lot of freebore. That is how the cartridge safely develops the velocity. Naturally, freebore tends to reduce accuracy.
Second and more important to people on this site, is the poor barrel life. I have heard (I haven't verified) that throat wear can be detected in 50 rounds. Even if that is an exaggeration, it uses 25% more powder than a 300 wm, a cartridge that is not known for barrel life.
While the cartridge may have some novelty for hunting, I think most people on this site would balk at replacing a barrel that often. I know I would rather spend money on practice ammo than rebarreling every 1000-1500 rounds.