At only 1.75" in length, the Aguila minishells offer a much higher tube capacity, but they are also known to flip around in the loading tray and jam up 870's and 500's.
I see that other companies make shotgun shells in a variety of lengths: 2.5", 2.25", etc
So does anyone have experience with short shells that will reliably function in a Remington 870 without tying up the loading tray?