I started reloading in 1981. Currently I reload for 34 calibers of rifle, handgun, and shotgun. I just left my reloading room because I didn't want to exaggerate. I counted my reloading manuals or books dedicated to reloading. I have 94 manuals. Most of the time when I get a new manual it lists some new powders, cartridges, or bullets, but otherwise is pretty much the same as the last version. My manuals are from all the major manufacturers. The Speer #10 manual is the first I ever bought in 1981 - it taught me how to reload, no friends or relatives did, just that book. I C-clamped a RCBS press to my kitchen table and started reloading. The new #15 manual is extraordinary! It's a completely new format. Take page 428 (of 948 pages) about the .30-06. It lists a half page of info about this cartridge before it lists "cartridge case data," then it has a section (still talking about only the .30-06) on "Ballistic Data" stating data from 8 factory loads. Then on the next page it has a heading called, "Historical Notes." It's a whole page with 13 lines/paragraphs of historical info. Then it has a heading called "Interesting Fact" and tells you one of the criteria for the development of the .30-03 (forerunner to the .30-06) was that it had to be capable of killing a horse at 1,000 yards with one shot! Next page (still .30-06) List 5 different "Technical Notes," 4 paragraphs of "Handloading Notes" < really good info, then "Safety Notes" and data I've never seen in any manual (I have a Phillip B. Sharpe reloading book from 1937 that's awesome too) it tells the maximum vertical height a 180 grain "06" can go - 16,572 feet, and the maximum horizontal distance at a 38 degree angle - 7,809 yards! The next 9 pages have data with modern (new and old) powders in bullet weights from 100 to 200 grains (no 220's?). In all I counted 167 different loads just for the "06." So here's the amazing point: This manual has that kind of info for all the cartridges listed! It does list a lot of loads for the "06" because of it's versatility, but all those headings are included in every caliber mentioned. The chapters before the reloading data are VERY GOOD. I don't care how much experience you have, you can learn something new from this book. I'll probably be studying it the rest of my life. Speer YOU HIT A HOME RUN. The older I get (I'm 65) the harder it is to impress me, but I've never been this excited about a new reloading manual. Buy it!