RE: ? new brass
Depends on how much time you are willing to devote to your case prep.
I would highly recommend a good book for your leasurely reading, "Handloading for Competition" by Glen Zediker.
I have been reloading since 1961, and thought that I was fairly will inforned as to handloading.
After reading his book, I implemented some of his steps from various chapters.
I found that you can make "crappy" Winchester brass into some very accurate and good hunting loads if you willing to put in the time and effort.
I have shot an .270 Win. for 45 years, and have never experienced results like I got after reading the book.
I chronograph all my loads, and the difference was well worth the time.
Load results: S.D. = 6; Extreme Spread = 14; Grouped @ .708" @ 100 yds.; 2965 FPS; Hornady 140 gn Interlock w/58.2 gn H4831SC, CCI-200.
Old data was: S.D. = 22; E.S. = 57; Grouped 1.534" @ 100 yds.; 2993 FPS; same bullet, primer, 57.9 gn 4831SC
Good luck, and good shooting