What’s the throat erosion per 1000 rounds on the Dashers ?
I wish I could give you a solid simple number, but I cannot. I will try and explain, fair warning though, I do not always articulate my thoughts very well.
When dealing with a new barrel, the lands move less than one that has a few miles on it....... I just do not think it is linear.
Here is another curve ball, the amount of erosion can vary by what cleaning process you use, and what you consider clean..... or clean enough.
Of course, how you measure touch, and how proficient you are at your chosen method is another variable.
I personally have cleaned barrels every conceivable way, in my testing, I do not call it clean, until it is clean. In my testing, my rifles shoot better clean. I use Iosso and JB, and other stuff to clean,....... when I am done cleaning, my barrels are clean. I use the "the finding touch method" the Montana folks described here on the forum and Alex Wheeler posted on his website several years ago to find my new touch after each match or range session.
With all that said, after my barrels are settled in and have a few miles on them, I expect to see .002-.003" movement every 100 rounds. Every time I come up with something less, I get the borescope out and look to verify. My barrels generally get me 1800 rounds before the x count starts degrading.
On that note, I experimented with Lock-Ease lock fluid on one of my dasher barrels a few years ago. I applied lock-ease after every cleaning just like Tony Boyer described in his book. That barrel eroded just like all the others but it was still winning 600 yard benchrest matches at 2200 rounds. More testing is needed before I can hang my hat on this.
With the cadence I shoot at, the cleaning process I use, the temperature extremes we shoot in here in Western Colorado, it all adds up to the throat moving. I have a notion, my barrels erode more than that of other shooters due to how I shoot and how I clean. One well known 1000 yard shooter told me that he normally gets 800 rounds before he sees erosion. I thought I was doing something wrong when I heard this and changed my cleaning method. My groups suffered..... and I went back to my regular method.
Hope this helps
CW
