Hi guys...

I've been debating a 'chicken and egg' question on the 'GENERAL' section:
http://www.airgunbbs.com/showthread....is-the-history

Feel free to shed any light on the origination of .22 as a starting point as per the original thread above.
That's the 'Chicken' part, but the 'egg' part below is for the assembled throng in 'COLLECTABLES'

Basically:

I know .22 was originally a rimfire caliber, and that 'Flobert' developed the first examples of rimfire by placing a ball into a percussion cap.
According to Wiki:
His cartridge consisted of a percussion cap with a bullet attached to the top and the idea was to improve the safety of indoor shooting. Usually derived in the 6 mm and 9 mm calibres

.22 is 5.6mm. The thread was to try and find out how/when the first .22 appeared....
...and when/how we ended up with .22 and .177 as the two main air gun calibres?

SO, my questions to the assembled gurus are:

1. who makes the first recognisable .22 pellet - and when?
2. who makes the first recognisable .177 pellet - and when?

NOTE: I believe the Sheridan/Crosman air rifle was the reason for the .20 after 1947. I'm presuming .25 is relatively new.