I noticed very recently that a couple distributors in the U.S. were showing some minishells from Challenger. These are the same idea as the Aguila minishells, and they are the same 1&7/8" length. Challenger is a mostly unknown brand in the U.S. with weak distribution, but I assume they are more of a Canadian thing… based on the packaging and headstamp? At first I assumed they were a product of Canada for obvious reasons, but as per the back of the box, they are made in France. Shown below as the blue shell, it is next to an Aguila minishell (red), and a standard 2.75" shell for comparison.