maybe it's that there is less material. after all, how can you wildcat a shotshell? look at how many articles you could write about cartridges, not to mention the old faithful, what's the best cartridge for whatever.
for that matter, i don't see a lot of stotgun related threads here. after all, the 12 and 20 account for the lion's share of the chamberings. 10, 16, 28, 410 far less useful.
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