And always check multiple sources of load data to see if they agree, powder mfg, load books, and any and everywhere you can find data. Start low and work up slow.. know what to look for for pressure signs.
Attention to detail, is the key.

Some load books do not pressure test ammo, others do.
Don't rush..research, read, and pay attention to detail.

There was a post on pressure signs.. I haven't seen all the info in one place before.
Read, and research. Then do it again.

Did I say attention to detail is the key...