Deer huntingI'd start with the purpose of the gun. Is it for hunting medium-larger game? Varmints? Shooting steel for fun? Competition? 1000 yard?
These answers will narrow down your choices. Availability and price will narrow it down further.
130 Berger Hunting VLD's have worked great for me on Deer & Antelope.Deer hunting
Deer hunting
Twist, freebore, and what your goals are for your hunting bullet will help you narrow the choices down.How do I go about selecting the right bullet?
Should I test different powders as well?The 130-140 class bullets is where I would look. H4831sc, H4350, RL23 are some excellent powders to start with as well.
I have a Nosler book I’m starting. I’ll pick up a Lyman as well.Do you have a reloading book? Sierra, Hornady, Lyman and Berger among others should be required reading before starting to reload. Additionally, there will be many recommended loads in them.