https://archive.org/details/FIREARMSDESIGNANDMANUFACTURING

over 7000 files to look thru

Amcp handbook series can be found here.

https://archive.org/details/@the_mad_wizard?and%5B%5D=amcp&sort=-downloads

real good info from the late 60's and early 70's

73 different books to help in understanding /k/ related

No.496090 here you go

https://archive.org/details/SOttesonTheBoltActionRifleVolI

https://archive.org/details/SOttesonTheBoltActionRifleVolII/page/n1

https://archive.org/details/FrankDeHaasBoltActionRiflesDBIBooks1995