I`m starting for the first time to reload for my double. My question is: What are the most common components like cases, powder, primers etc. so I can get the most out of this and have the most experimental freedom to get the best load. I`m loading for a 12ga. 2-9/16. Also, what`s a good resource for data ?

Thanks to all,
Burch

God bless the fine men and women in the U.S. military