The instructions on the particular Chorno. you get ,have a great deal of good info & tips , not trying to be funny .
I keep my screens about ten feet away from the muzzle blast on rifles .The Sun & Clouds will determine if you need the shade shields . I just put mine on every time any way.
Battenfield Technologies Inc. ( Premium Kit ), I like this one , because it says you can read it off your Smart phone .The Premium Kit has every thing you need , including a light kit for night shooting .
Competition Electronics -------, they have several models
Pact ---, one of the top of the line & you will pay for it . I have one of their Digital Scales & had to send it back the first year , because it would not come out of Calibration mode & they fixed it . They make a good product.
I have an RCBS , my wife got it for me for Christmas a few years ago & it quit working on me the first year & after sending it in , they replaced it with a brand new one & has worked great since , eats Batteries 9V , I unplug it after use & it lasts loner , for some reason . Works good , but not my first choice .