I believe i purchased the same breech plug as you. As i wrote in your other thread, the flash hole eroded a way faster than i would have thought. Just so you understand, i 'measured' the flash hole diameter using these pin gages contained in the red box.



The shots were counted by saving the spent primer. I have since replaced the brazed in vent liner with one of my home made vent liners, and am now into a shot count on it. The results will be shared with the forum.

Bear in mind my shots were taken in the 45 using 120g of BH, and this was done in the heat of summer, and sometimes i don't allow the rifle to cool very long.





.