Since I started Gearsofguns.com last year I have been buying up ammo like it is going out of style for all the reviews the crew has worked on as well as just for the sake of stock piling.
I never have really been a fan of bulk ordering online because it meant I had to search for hours for what I hoped was the best deal. About a month or so ago I was looking to order a few thousand rounds of different calibers for planned reviews when I found Ammoseek.com. As the logo states they are an ammunition search engine.
They break the search down in to four main categories of Handgun, Rifle, Rimfire, and Shotgun and then they break it down even farther with Caliber, Ammo type, Grains, Manufacturer and more for each main category so you can narrow down to exactly what you are looking for. Everything in life should be so easy.