I'm specifically talking about collated framing nails for a pneumatic nailer.
For example, the IRC calls for 16d common nails (3-1/2" length, 0.162" shank) all over its fastening schedules. Clearly a 16d common will cover a majority of the scenarios one would encounter. Yet every local retailer that sells collated framing nails does not stock such a nail. The closest I can get is usually 3-1/4" with a 0.131" shank. Does everyone skimp on the fastening schedule because most inspections won't catch it, or am I missing a crucial piece of information?
I get that most professionals aren't going to be shopping at blue box or orange box, but even those folks are going to come up short sometimes and need to make a quick run to grab a few more nails. Surely retailers would only stock/sell the most in demand sizes, how is a code compliant 16d nail not that?
Admittedly this sounds more like a rant than a question, but I'm genuinely curious if I'm missing part of the picture. Are folks just sloppy when it comes to sizing their fasteners, or are pneumatic nails slightly smaller but "equivalent?" What's going on here?