[quote=“VinceGreen”]Ballpark guess on age would be 1920s or there abouts. My only theory on the length is that it was may have been intended to be trimmed before loading.
The color is a bit unusual, most Eley 20ga were a creamy light yellow. That might make yours a bit more collectable.
Even 3" Eley 20ga cartridges of this age would be unusual in Britain. The 20g was considered a ladies gun and ammo was of standard length. In fact 20ga shotguns were far from common and almost exclusively made by the better gunsmiths for titled ladies to accompany their husbands on formal driven game shoots.
We didn’t really start to see longer chamberings until the 50s when US made shotguns started being imported in small numbers. Really the Remington 1100 was the first 3" 20ga I remember ever seeing and that was when the skeet shooters started to see its potential.
If Eley made them before that date it may have been intented for export, which may explain how it found its way to you.[/quote]
From 1878 to 1914 all the Eley catalogues and after ICI catalogues till 1938 show 20 gauge 3 inches long shotshells.
These catalogues are not for export.
Therfore 20 gauge 3 inches shotshells have never been unusual in England and this fom the oldest days.
About the color now :
Green, brown, orange, blue, light brown were the standard Eley colors till 1914.
I have exactly the same shotshell as Rimfire but it was badly cut to 3.07 inches