I just bought my first gas check mold and have some questions. First, do I size the gas check with the bullet or just press it on after the bullet is sized and lubed. I got a sample pack of 22 cal gas checks for my Mihec 223 Heavy mold and the gas checks just fall off. I tried sizing them which does better than just pressing them on but they and still not tight.
I apologize if the info is already on the forum but I searched until my fingers hurt with no success.