This statement doesn't really make much sense, but i decipher it to be a slam at the posts i have made about flash hole erosion. What i wrote was more of a report on how many shots it took to erode flash holes to 0.035". Indeed, it did only take a little over 100 shots to achieve this amount of wear. However, i don't recall ever writing these plug/ventliner were 'worn out'.


Just so you know, i measure the diameter of flash hole using the set of pin gages pictured in the photo below.





It is possible for me to use my eyeball, and see the difference between a flash hole that measures 0.035", and one that measures 0.028". However, one cannot eyeball a flash hole, and 'know' it's size after thousands of shots. The laws of physics show, that a flash hole increases in size with each and every shot through it, and after enough shots will increase by 0.001", and then another, and so on etc.