Winchester was actually really smart the past 3 years with what they did. Yeah, the 350 introduction was botched with incorrect bullet diameter shown, etc. But, once it took off, it went crazy.

They brought out the 400 last winter, but I believe they delayed it on purpose, because the 350 was doing so well all year. In about 3 weeks there will be major product announcements on the 400. Probably most every gun in 350 will also come out in 400. Mossberg and Savage already have guns at dealers. Winchester will announce probably 20+ models. Ruger has already put the 400 on their site.

The 350 and 400 will easily pass the 450. Nothing wrong with the 450, except in factory ammo there are some junk bullets being used that do not perform well.