A caliper is a must.
You'll want full length dies from what i've read at shortmag .com <-- no longer an active site.
Ask for some opinions on the best powder to use for the bullet weight plan on using.H 1000 hodgden powder looks 'the' powder for 7mm wsm
,according to my Lee precision manual.
The 7mm wsm is an absolutely great cartridge -it's my favorite for sure.It packs lite and packs plenty of punch for most big game hunting in the continintal U.S..
For longrange work it appears the 162gr AMax will be hard to beat ,i've heard good things about the accubond also and they're very accurate in my 25-06.
The rcbs supreme kit is great you'll be very happy you took up this hobby and won't be able to conceive shooting a factory round.When you see someone shooting factory stuff you'll think -----------rookie...Best of luck Mike