My collection started cheep, 5 shells for $350, nothing uncommon. then I got a few more cheep shells and then a book. then found out how many variation of shells there are. I spread funds acrossed 5-6 fields ( bayonets obviously) and decided I wanted example of different looking shells. while doing this, I found 3.3 was mainly just CS, shells varied wildly in shape and size and I like odd calibers, not just 3.3's now. , then there are REV war marked shells, and 70+ shells later still don't have all I want