#4 buck, 2" shell. Whose idea was that one...?
I would trust it. Just seems like a weird shorty.
(Not saying I don't change shot size in shot shells as long as the mass is the same or lighter, though...
)
I have been looking for my 12 ga mini data. If I find it, I will share. But it has gone walkabout for now.
I load some 2.5" and 2-9/16" shells and roll crimp for feeding in some older shotguns. Since roll crimps are pretty much one time use with plastic hulls, but I am a cheapskate, I cut them down for further stupidity. I work my way back to 1.75", and that is the last firing.
I will admit, however, that I am using plastic wads for those loads.
It was based on some data that BPI published, but has long since deleted, showing pressure changes with their various wads, along with dimensions, seating force, and wad base volume.
If you can find smokeless data for paper shells, however, it is much easier to just adjust the wad column for length. And/or reduce the payload.
Isn't "widespread" a bad word in shotgun talk?