I would recommend Lee carbide sizing dies for any straight wall pistol case, especially .40SW, as they size further down the case, and help prevent chambering issues...I use them for my 9mm in a Super 1050
weigh out 10 charges when you adjust your powder measure, and move the decimal place... 10 charges weigh 43 grains, then 1 charge is 4.3 grains....make sure the surface you place you balance on is flat, and don't put it on top of any Styrofoam packaging... stand up, and as commented, place a good light over your charging station... standing helps prevent tendonitis
I use Winchester Super Field (WSF) for my 9mm, and use Precision Delta 147 grain fmj, but most of the intermediate burn rate shotshell powders will work for the lower pressure pistol rounds..
I'm a retired science teacher, and prefer a traditional balance rather than digital...if you don't have calibration masses, a couple of factory bullets from a major manufacturer can be used in its place to check a couple of readings
make it a point to look at the powder level in each case before you set a bullet, and use enough bell and correct top punch to seat the bullet straight