We specifically designed our breech plugs for reliable, fast ignition. Stuck primers can occur any time, it is the nature of the beast. Primers have varying lengths and diameters from different manufacturers, and even different lots from the same manufacturer. We can only make a breech plug to accommodate all primers. Some will fit tighter, some will fit looser. If stuck, simply grab the rim with needle nose pliers and turn while pulling back. A Leatherman tool with needle nose pliers is a great tool to keep on your person while hunting and shooting.