Will I need something to check muzzle velocities?
A chronograph is a handloaders best friend, but it is not necessary to get started. Buy the RCBS kit and a couple of bullet manufacturers handloading guides. I always recommend the Sierra guide as a starting point, and you can buy others as time goes on.
READ THE GUIDES COMPLETELY AND UNDERSTAND THE PROCESS BEFORE LOADING!! Also, the internet can have some good, helpful information and a lot of bad, dangerous information. BE CAREFUL!