Metallic Cartridge Handloading
We can't emphasize enough how impressive these books are. No matter how long you've been doing this, these are valuable. These are way more than just reloading manuals. Almost everything you have ever been curious about regarding ammo, accuracy, internal and external ballistics and a heck of a lot more is here.
Click on the pic, it's linked to Amazon.
Ideal Loading Handbooks
We've always collected reloading manuals. And than we discovered the old pre-war Ideal manuals. After WWII a lot of information was discontinued in reloading books in favor of the new high velocity cartridges. These pre-war gems are full of original info that is difficult to find today. The info on bullet originality, styles, purposes, diameters, etc. is not found elsewhere and often conflicts with "Cartridges of the World". (Which we value as well)
If you are having case bulge problems with auto cartridges, these two machines are an answer to that problem. 9mm and 40 S&W are high pressure cartridges and can swell the bottom portion of the brass case that the sizing die can't quite reach. These are really cool machines that will solve that problem. They are kinda pricey but they work really well. Click on the picture to be taken to their web sites.
Groove diameters of rifles from 1937 publication. Note the minimum and maximum differences. They didn't have the tool steels for cutting that we have today so their tolerances were looser. But they were working with soft lead and hollow bases so it worked fine. Jacketed bullets didn't necessarily shoot well sometimes so you might have to slug your barrel.
Notice the sentence that all Colt handguns were 1:16" twist