I've got all 4 issues---9mm,45acp,.357Magnum, 44Magnum. Great source for comparing data. I use powder manufacturers data, bullet company data, and reloading company data such as Lyman. The Midway loadmap data is very useful.
The 9mm LoadMap uses Remington cases and WinSP primers with all tests. They test for instance 17 different 115 grain bullets with 10 different powders. 10 different 124 gr. bullets and 10 different powders and 11 147gr. bullets. Bullets from Hornady, Midway, Nosler, Remington, Sierra, Speer, and Winchester.
The 45acp LoadMap uses Remington 2 1/2 primers and Remington cases for all tests. They test 14 different bullets in 230 grain with 10 different powders for instance. They also test bullets from 185-265grains.
.357 Magnum data in the LoadMap uses Winchester cases and Win SPM primers in all tests. They test 23 different 158 grain bullets with 10 powders. Also bullets from 110-200 grains.
The 44 Magnum LoadMap uses Winchester cases and Remington 2 1/2 primers in all tests. 19 .240gr bullets tested and other tests from 180-300 grains using 10 different test powders.
When working up a load for any of these 4 calibers, I consult the bullet company manual, then the powder company manual, then compare the data in the LoadMap. It's very useful in comparing bullets from different companies. The LoadMap's are case and primer specific and if you use other cases or primers then you have to be the judge. They do, and I don't know why, seat a lot of the bullets to maximum overall length which isn't the correct seating depth for especially 9mm and 45acp. I've found the LoadMap data to be pretty realistic with the loads I've tested. I highly recommend the LoadMap series of manuals for comparing and working up loads. Don't know why they stopped unless lawsuit liability in today's legal suit happy climate or were the tests and publishing not cost effective?
What I like about the LoadMap manuals best is you can kind of compare their data with for instance all 230gr FMJ 45acp bullets and get an idea the differences in velocity and pressure with the same charges. Not much difference with some 230fmj bullets and more with others.