That can have a huge effect. It's more likely, however, that after 25 years the flash channel in the nipple is seriously eroded and enlarged, to the point where the combustion gas from the cap is dispersed and cooled off before reaching the main charge.If the tip of the nipple is bent due to prolonged contact with the hammer over 25 years how will that effect the gun with hang fires, not firing one time and then firing the next?
May sound strange but if you have been at this for any length of time, Dry-Ball will happen. Initially the problem you have is not getting a deep enough bite with your screw jag. Then you have to make sure you have a rod that will take the torque. I have gotten in the habit of makeing 6- quarter or short turns and that works for me every time. Now, a mis-fire is a different story and there are a number of ways to clear this, powder under the nipple is one. ..I have a screw on the ramrod but it is not pulling the ball out
Was the clean out screw ever removed to clean out the flash channel?
Truer words were never spoken and it happens all the time. This is one reason why during our classes, we normally have one loader and that is all he does. Another at the line with the students and a third, keeping an eye over everyone. At any time we may have up to 15-students that shoot once and some double back. .....When loading try to avoid distractions, focus on the procedure. Do it the same way each time and develop a rythm. At ranges when people walk up and engage the shooter in conversation, that is invariably when dry balls happen. The rythm was broken and the loader distracted.