As with all Lyalvale products extensive research was carried out to determine the exact type of cartridge required by the game shooting fraternity. It was decided to produce two types of cartridge: the first a light load 25gm (7/8oz.) cartridge in a true 2 1/2inch (65mm) case for use in traditional English guns, and the second a slightly heavier 28gm (1 oz.) for a more powerful cartridge.

All Lyalvale 16 gauge loads evolve around the proven combination of components used in all our cartridges. The propellant is Vectan manufactured in Brittany, France to the exacting standards required by Lyalvale. The lead shot is manufactured in Italy to our specifications at a specialist lead shot manufacturing facility. Quality control of the shot includes checking the alloy and antimony content of the shot as well as for sphericity and surface imperfections. The cases used are manufactured in the EEC and are coloured Blue to distinguish them from other gauges.

As of the 2000 game season the 25gm Plastic wad cartridge has been replaced with a Fibre wad version to meet the environmental requirements of today's gameshooter. The powerful 28gm still remains loaded with a plastic wad to ensure the longest ranges for the most demanding of quarry.