Yes, they did make a 4 1/4" chambered gun and Eley made the cartridges. I will get a photo of one of the cartridges from my collection and post it in due course. If you can get a copy of a book called 'The Modern Fowler' by James Wentworth Day he talks of using his Tolley 4 1/4" 8 bore which he christened Roaring Emma. The 4" and 4 1/4" guns would fire up to 3 ounces. A sort of Magnum 8 bore. Lagopus.....