David,
I have also read where it is difficult to get repetitive readings, but I have a few thoughts about how I might modify tension inside of the bore. I am hoping to at least have a margin of error with which to work. Combined with my bore caliper, I have to think I can at least identify a potential problem. I'll just pass if things start getting marginal.
I agree regarding the pressures you listed inside the barrel after the first 3 inches, but I don't know what your numbers mean without reading the article. My primary question is in regards to where 3" is located? 3" from the breech? 3" from the end of the chamber? 3" from the center of the chamber? 3" from the breech? I've read in several places that pressure is highest IN the chamber, but how much more vague can you get when the chamber itself is often nearly 3" long? Is pressure the highest behind, even with, or in front of the powder charge?
I shot placed birds yesterday with a friend. I was making a point of making sure I could see the ground through the bore before placing the next shell in the chamber of my gun. I have not been vigilant about this practice in the past. My challenge is making sure to do it after every shot. Would everyone agree that complacency is the real enemy in regards to obstructions?
