Follow the link and you'll see all the info you need. The only problem I have with Buckhammers is that I'm still shooting a smooth bore barrel. The Buckhammers are designed for rifled barrels. Plus the fact that they are about $12/box.

Some friends of mine used them this year and really like them both on the range and off. One is using an 835 with a rifled, cantilever barrel and a 3-9x40 Simmons.