Discouraged

[moneychanger]

if your sidelock is made by lyman or cabelas or some toher italian or spanish firm there will be a screw just below or very near the nipplle. this is a cleanout hole and sometimes they tend to plug up. clean out this channel.

another possibility is to pull the nipple and use a pipe cleaner to clean out as much as possible,and while you have tthe nipple off
look thru it to make sure there is nothing blocking the nipple hole.

further, the hot german nipples always went for me,but since i've gone to musket nipples and with one of these your rifle should go bang each time.

finally just in case of a misfire after pointing your gun in a safe direction try pulling your nipple put a small amount of powder in this channel reinstall thenipple and fire.

good luck.