What most beginners need to know even load data given to them by someone standing face to face to them and even if the person is as honest as the day is long can have a forgetful moment. Could quote the wrong powder, the wrong charge weight, the wrong bullet weight, the wrong seating depth, the wrong powder or even giving the wrong caliber for another.
That is the reason all beginners need to consult a "BOOK". I do that myself and I have been reloading for 41 years and still will research loads over, under around and through.
Why do beginners think they don't have too knowing how mistake ridden human beings are.
I am now working with a Jerry Michlek (SP) 45 ACP revolver. I am going to try Bullseye in it and an working with 2 different bullets the 259 Magma RNFP and a 270 Mihec that weighs 280 grs.
I know that Speer Number 11 and 13 manuals list 5.2 gr Bullseye with a 260 gr JHP bullet for the 45 Colt in 45 acp cases. The seating depth for the bullet is .380" my 250 gr Magma seats at .355" and that the 45 Auto Rim Starline cases I have have roughly 4 percent more capacity than the average 45 ACP case. Would I start at max? No. Close to it yes because I know under that circumstance I will be safe. With the 270 Mihec I will start more than low enough and sneak up very gradually on the charge.
Remember that a 2 percent increase on a 5.0 gr charge is a .1 gr change. In a rifle a 2 percent change in a 50 gr charge is 1 grain.
This is where research comes in and most beginners don't do it.
Still Look in the book, books and a manual.