From a fellow on facebook:
A friend was having trouble with a new Lyman miss firing,we put a new RMC touch hole liner in, helped a little, drilled the touch hole with a # 52 drill help even more but it just wasn't right. I decided to use a modified breech scraper in the Patented Breech and found a small piece/burr from the threading of the touch hole was down in the patented breech blocking the powder from getting to the touch hole.Got the metal piece out after a little working it back and forth to get it to come lose,and now the gun fires fast every time.So if anyone is having trouble,I would look into this.Just a case of poor workmanship on the part of Lyman.
A friend was having trouble with a new Lyman miss firing,we put a new RMC touch hole liner in, helped a little, drilled the touch hole with a # 52 drill help even more but it just wasn't right. I decided to use a modified breech scraper in the Patented Breech and found a small piece/burr from the threading of the touch hole was down in the patented breech blocking the powder from getting to the touch hole.Got the metal piece out after a little working it back and forth to get it to come lose,and now the gun fires fast every time.So if anyone is having trouble,I would look into this.Just a case of poor workmanship on the part of Lyman.