get a basic reloading kit...I have the RCBS rockchucker kit, and then got the chargemaster 1500 combo. I love it, only been reloading for a couple months now. Just pay attention, read alot, and you'll be fine.
I also have a rem 700 300rum, and am still in the process of working up loads for it, so I'm in the beginning of the learning curve.
I feel like I have already started learning alot just buy working up loads and shooting a lot, with the RUM.
keep reading here, practice a lot, buy good stuff the first time, and have fun.
good luck