A little humor about shooting cast bullets in an H&K P 7. A trip to the range with both of my P7 pistols and a few boxes of my reloads with 115 gr FMJ bullets. I have read the H&K instructions concerning no lead bullets, however, for some reason I had 16 rounds of hard lead cast bullets lubed with Alox stick lube left in one of the boxes, two magazines worth. My thinking, what if this is all the ammunition I had and the bad guys or the bull were coming? First magazine shot great, function and group wise, quickly fired the second magazine. Then I noticed the smoke coming from the action, it appeared the pistol was on fire! The bullet lube blew through the hole in the barrel and into the hot piston chamber and the piston itself. The lube still being in a liquid form due to the heat. Needless to say cleaning my P 7 that evening was somewhat of a chore as the bullet lube hardened and was not all that easy to remove. As for the P 7 pistols, stay with the jacketed bullets.