28 gauge Parker choke boring/testing

[Pa SxS]

Here is the stock book information for a VHE 28ga. If you look at the far right, the patterning was done using size 8 shot in a 30" circle at 30 yards. I'm not sure if they always used these measurements. If you look at the gun directly above 201921, it's a 20ga. using a 30" circle at 40 yards, and the gun below was a 16ga. gun also using a 30" circle at 40 yards. I wanted to see what they used for a .410 but from the data in TPS, the earliest .410 was 215833, well after Parker changed their stock book from a horizontal format to a vertical format. The vertical format doesn't show patterning info.

It would be interesting to see what a hang tag would say was used on a 28ga. or .410. Maybe they used a generic hang tag that all read 30" at 40 yards or used a hang tag specifically for 28ga. and .410. Anybody got one?

My 28ga. has .018 and .022 chokes. IM and full.