it was a tree hugger attempt to lower the amount of lead in the environment
the blast pressure waves produced by detonation of both lead styphnate and diazodinitrophenol (DDNP) based firearms primers measured with a high-speed pressure transducer located at the muzzle of a rifle (without powder or bullet). These primer blast waves emerging from the muzzle have a pressure-time profile resembling free field blast pressure waves. The lead based primers in this study had peak blast pressure variations (standard deviations from the mean) of 5.0-11.3%. In contrast, lead-free DDNP-based primers had standard deviations of the peak blast pressure of 8.2-25.0%. Combined with smaller blast waves, these large variations in peak blast pressure led to delayed ignition and failure to fire in brief field tests.
LOL, did you get all of that?