These primers are heavy metal free and there is absolutely nothing in the exhaust which is environmentally harmful. This means there is no lead exhaust, so the primers are ideal for gallery use or for those who have a problem with lead exposure.
The small pistol primers, were designed for use in smaller cases such as the 9×17 (.380), 9×18 (Makarov), and the 9×19 (Luger) cartridges all of which have very high loading densities. Consequently, they have mild ignition characteristics. Therefore, there is a possibility of a squib or failure to ignite the powder with a very low loading density charge or too much free air space in the casing. Only high loading density loads are recommended.
Due to their mild ignition characteristics, they will produce slightly lower muzzle velocities and chamber pressures and will require a 3 to 15 percent increase in powder charge to duplicate established loading data.
Most Lead free or HMF primers on the market today have a problem with reliability due to moisture or storage at higher temperatures which causes misfires. This primer has none of these problems and has a storage life equivalent to standard non-corrosive primers.
In view of the above and due to the “surplus” or foreign manufacture factors. These are sold on “as is” basis.