i use it all the time, to help guys wanting the correct bolt for projects ect...
at one time i had a bunch of A4 bolt info, pictures ect, i belive Jgaynor or Mike has all that info, as i got busy with work, i didnt have the time to keep the charts and rifle info.
maybe JB has that info as well now..
admited, i dont do the same sort of collecting, and searching as i used to,,,just dont have the time anymore.