Do the fools who bring out these new rifles in new cartridges ever do any market research in advance to try to determine how many they would actually sell. Yes, the .450 has a few technical advantages over its cousins, but not one in a thousand shooters give a darn about them. The .450 is a hairsplitting cartridge, surrounded by very effective cartridges on either side.
The idiots at Marlin who came up with the .450 idea should have figured out that if they had brought out a straight gripped Marlin in .35 Remington, with a 2/3rds length magazine tube, they would probably have sold ten times more rifles.
I guess that their big play was to make most of their money selling the .450 ammo, not the rifles themselves.
What's next? The .31-30, to fit between the .30-30 and .32 Winchester Special? Oh yea, I just got to have one!!! It will fire a 182 grain bullet instead of a 175 grain bullet, and it will be a whole 50 fps faster!!!
Mannyrock