B.B. has written an interesting article on early target shooting with the Zimmerstutzen rifles.
The Zimmerstutzen was the ancestor of the 10-meter target [air] rifle and extends back to at least 1840. Zimmerstutzen is the rough translation of “parlor rifle” in German. The first zimmer was powered by a percussion cap that propelled a small lead ball through a short rifled barrel.
What I found fascinating was that there were 25 different Zimmerstutzen calibers!
A Zimmerstutzen comes in the nominal caliber 4mm, but in fact there are over 25 discrete calibers that range from 4mm to 5.55mm, in half-milimeter increments.
Zimmerstutzen vs .22LR
Read the article here.