Quote Originally Posted by lysander View Post
1) The first failure was about 10,500, the next 15,00 or so, the most were in the 17,500 to 20,500 range, a few further out.

2) Is that from some study, your experience, or someone else's experience? And, what time frame?

3) The test was repeated in 2015, just to see if M855A1 changed things. Answer not really, but that report does not have near the raw data of the earlier one, so you can't calculate other things, you might want to.

4) That is basically what they do with the M4s.

In any case, I fail to see any evidence of HPT harming the bolts to any extent.
To the underlined, that makes sense. As you stated, if you dont exceed the yield point, the effects would not be measurable - within the effects of all the other variables.

Which brings up a point, people want to fine tune minutia within a system that incorporates multiple variables, its not realistic without a single, dedicated test system, or massive identical case subjects under controlled circumstances