Is there an SAE specification that details in depth how to perform correlation and peening of small holes with L/D<1? There seems to be many different opinions and ways of performing this but I cannot find a defined process.

Thanks

Nothing in SAE specs but this article from Progressive may help.

http://www.shotpeener.com/library/detail.php?anc=2003005&keyword=barker

Is there any reason not to correlate directly from a standard strip to a hole test? I have also read about an R2 value but not sure what this is.

It would be good to get a standardized process across the industry but thanks for the info Jack.