Note: this is not meant to be an all-inclusive bibliography of every known work or website related to these subjects. It is merely a list of those published references and websites that I have found to be particularly useful to me -- as a collector, reloader and shooter.
CARTRIDGES AND RELOADING
Complete Guide to Handloading (Second Edition) by Philip B. Sharpe; Funk & Wagnalls Company; New York; 1937, 1941
A big (8-1/2" x 10-3/4", 465 pages, plus the 72-page 1942 Supplement), heavy book with step-by-step reloading instructions. Also contains a lot of load recommendations. Somewhat dated (many of the powders mentioned are no longer available), but a "must have" nonetheless.
FIREARMS: HISTORY, TECHNICAL & ILLUSTRATIONS
The Book of Rifles (Third Edition) by W. H. B. Smith and Joseph E. Smith; The Stackpole Company; Harrisburg, Pa; 1963
This book has a lot of information on both military and sporting rifles -- some of it quite detailed and technical. Good illustrations, as well as detailed info on bullet and cartridge dimensions. 656 pages.
Handbook of Military Rifle Marks, 1866 - 1950 (Second Edition) by Richard A. Hoffman and Noel P. Schott; Mapleleaf Militaria Publications; St. Louis, MO; 1998
A great source of information about all kinds of obscure military rifle markings. No photographs; all of the marks are drawn in pen and ink. Lots of good historical information, too. Large (8-1/2" x 11") paperback format, 60 pages.
Flayderman's Guide to Antique American Firearms...and their values by Norm Flayderman
Really an indispensable reference for anyone interested in antique Americna firearms. Almost as big as a telephone book -- my old 3rd Edition (1983) is 624 pages long. Paperback.