Welcome aboard and if you're on the lookout for 450b ammo,
here's good ammo search engine. Check it frequently as stock and prices change like the spot oil market. If you go to the top level of the engine, you can set your search criteria for any caliber you might be interested in. Some of the lower priced resellers aren't showing up right now in the 450b search results, perhaps because they don't have any in stock at the moment. That's why it pays to check often and if you find the price you want, be ready to move on it before it goes out of stock again. Of course, as you said, it pays even more to reload. I have my doubts that this caliber will ever become so pervasive as to give us more than one or two manufacturers, who due to their scarcity, will command what the market will bear. A year ago, I would have considered paying fifty cents to one dollar for just the bullet and a dollar for one new piece of brass grounds for not ever choosing the caliber that commands such a high premium for it's reloading components. Unfortunately, I stepped on this
fly paper and now feel compelled to struggle in vain to free myself from it's grasp.
Hoot