Probably old news to most experienced shotgun users but get this wrong and you’ll have a REALLY bad day.
In particular I’m talking about 12, 20 and 28 gauge.
Be very careful not to carry round mixed cartridges as you could inadvertantly cause a boom!
Because the smaller of the cartridges slips right in and stops just as it hits the barrel allowing you to look down, think “I could have sworn I loaded that” then chambering the proper yet larger round on top of the tiddler.
So, as you pull the trigger on your spray and pray machine, the tiddler goes BOOM!
What does that look like?